WO2000046636A1 - Afficheurs a cristaux liquides cholesteriques, bistables, a empilement, mettant en oeuvre un ensemble unique d'elements electroniques d'attaque - Google Patents

Afficheurs a cristaux liquides cholesteriques, bistables, a empilement, mettant en oeuvre un ensemble unique d'elements electroniques d'attaque Download PDF

Info

Publication number
WO2000046636A1
WO2000046636A1 PCT/US1999/030103 US9930103W WO0046636A1 WO 2000046636 A1 WO2000046636 A1 WO 2000046636A1 US 9930103 W US9930103 W US 9930103W WO 0046636 A1 WO0046636 A1 WO 0046636A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
layer
electrodes
crystal material
row
Prior art date
Application number
PCT/US1999/030103
Other languages
English (en)
Inventor
Gene A. Miceli
Chad M. Jones
Xiao-Yang Huang
Original Assignee
Kent Displays, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kent Displays, Inc. filed Critical Kent Displays, Inc.
Publication of WO2000046636A1 publication Critical patent/WO2000046636A1/fr

Links

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
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • 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
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • G02F1/13452—Conductors connecting driver circuitry and terminals of panels
    • 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
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13471—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells
    • 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
    • G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/139—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent

Definitions

  • the present invention relates to a multi-layer or stacked cholesteric liquid crystal
  • a liquid crystal display comprises a single layer of liquid crystal material
  • one of the substrates is disposed a set or array of parallel column electrode segments (column electrode array) and on an inwardly facing surface of the other of the
  • substrates is a set or array of parallel row electrode segments (row electrode segments), extending generally perpendicular to the column electrode array.
  • electrode segments are spaced apart by the rows and column electrodes.
  • Display picture elements or pixels are defined by regions of liquid crystal material adjacent the intersection of the row and column electrode segments.
  • a pixel Upon application of a suitable electric field, a pixel will assume one of two or more optical states (e.g., a reflective optical state or a non-reflective optical state).
  • a pixel, P(xi,yj), formed at the overlapping or intersection of the ith row electrode segment and the jth column electrode segment is subject to an electric field resulting from the potential difference between a voltage applied to the ith row electrode segment and a voltage applied to the jth column electrode segment.
  • the optical state of an image pixel depends upon the configuration of the liquid crystal material defining the image pixel. Moreover, the state of the liquid crystal material may be changed upon imposing an appropriate electric field across the liquid crystal material for an appropriate period of time. This is accomplished by appropriately energizing the row and column electrodes defining an image pixel so as to generate an electric field having a desired
  • chiral nematic (also called cholesteric) liquid crystal displays are able to maintain a given reflective state (reflective or nonreflective) without the
  • liquid crystal display is to be changed, some pixels will require a change in their state of reflectance while others will not.
  • the display driver circuitry appropriately applies the electric
  • liquid crystal material has a visible color appearance in its high reflective state, a pixel in a high reflectance
  • Display driver circuitry is coupled to the vertical and horizontal electrodes of the row and column electrode arrays. Operating under the control of a logic and control unit, the display driver circuitry energizes the row and column electrodes with appropriate voltage waveforms such that an appropriate voltage across each pixel is generated. The voltage
  • the present invention is directed to a stacked cholesteric liquid crystal display having a
  • the stacked cholesteric liquid crystal display comprises a plurality of layers of spaced apart cholesteric liquid crystal material, each layer of liquid crystal material being bounded by a set of row electrodes and a set of column electrodes, the regions of liquid crystal material adjacent the intersections of the row and column electrodes defining a set of image pixels.
  • high reflectance state image pixels as seen by a viewer of the display that is, an image pixel visible to the viewer as a single pixel is actually comprised of two (or more) aligned pixels.
  • the combined brightness of two aligned pixels in their high reflectance states provides for a greater brightness than the brightness of a single pixel in its high reflectance state.
  • the novel drive electronics of the stacked cholesteric liquid crystal display include a single set of drive electronics comprising a single set of row driver electronics and a single set of column driver electronics for energizing the multiple sets of spaced apart row electrodes and spaced apart column electrodes of the display. An electrical coupling is provided between
  • the plurality of sets of row electrodes and an electrical coupling is provided between the plurality of sets of column electrodes. Since the plurality of sets of row electrodes are electrically coupled, the single set of row driver electronics controls energization of all of the row electrodes in the plurality of sets of row electrodes and since the plurality of sets of column electrodes are electrically coupled, the single set of column driver electronics controls energization of all of the column electrodes in the plurality of sets of column electrodes.
  • the sets of row and column driver electronics constitute a single set of drive electronics.
  • the electrical coupling between the sets of row electrodes preferably utilizes flexible interconnects.
  • Each flexible interconnect electrically couples a spaced apart pair of sets of row electrodes or a spaced apart pair of sets of column electrodes.
  • the flexible interconnects are preferably connected externally to the display substrate. That is, the flexible interconnects are connected in an overlying position on the corresponding indium tin oxide (ITO) traces that are
  • a conductor need not pass through the substrate for electrical
  • the row driver electronics is electrically coupled to a selected one of the sets of
  • row electrodes e.g., to one substrate
  • flexible interconnects is electrically coupled to the remaining sets of row electrodes.
  • electrical coupling between the sets of column electrodes utilizes a flexible interconnect.
  • driver electronics is electrically coupled to a selected one of the sets of column electrodes (e.g., to one substrate).
  • a stacked display apparatus includes: first and second layers of chiral nematic liquid crystal material; substrates bounding the first layer of liquid crystal material and the second layer of liquid crystal material so as to prevent communication between the first layer of liquid crystal material and the second layer of liquid crystal material; first row and first column conductive electrodes disposed on the substrates bounding the first
  • first row electrodes extend transverse to and on a different substrate than the first column electrodes and the second row electrodes
  • first row electrodes and the second row electrodes extend transverse to and on a different substrate than the second column electrodes. Also included are electrical conductors interconnecting the first row electrodes and the second row electrodes and electrical conductors interconnecting the first column electrodes and the second column electrodes; row driver electronics electrically coupled to one of the first row electrodes and the second row electrodes for applying voltage to both the first row electrodes and the second row electrodes; and column driver electronics electrically coupled to one of the
  • first column electrodes and the second column electrodes for applying voltage to both the first
  • the stacked display apparatus of the present invention is suitable for any passive display including matrix displays and segmented displays.
  • a matrix display is one in which
  • each set of row electrodes comprise a plurality of parallel substantially linear electrode
  • segments and each set of column electrodes comprise a plurality of substantially linear parallel
  • electrode segments and the column segments are substantially perpendicular to the row
  • a segmented display includes sets of row and column electrodes that may not be linear or parallel, an example would be a display having a series of pixels comprising a seven segment display.
  • Figure 1 is a perspective view of a stacked, bistable passive matrix, cholesteric liquid crystal display of the present invention
  • Figure 2 is a sectional view of the display of Figure 1 as seen from a plane indicated by the line 2-2 in Figure 1 ;
  • Figure 3 is a sectional view of the display of Figure 1 as seen from a plane indicated by
  • Figure 4 is a side elevation view of the two interconnected displays comprising the display of Figure 1 at the beginning of the assembly process;
  • Figure 5 is a side elevation view of the two interconnected displays of Figure 4 showing the displays being folded towards each other after electrical connection of electrodes
  • Figure 6 is a side elevation view of the two interconnected displays of Figure 4 showing the displays in a stacked formation;
  • Figure 7 is a side elevation view of the two interconnected displays after electrical connection of electrodes from each display, this view being rotated 90° from the view shown in Figure 6;
  • Figure 8 is a schematic diagram of the display of Figure 1 and a block diagram representation of drive electronics connected to the display.
  • the display 20 of the present invention is a stacked passive matrix, bistable, cholesteric liquid crystal display, for example, a VGA sized stacked liquid crystal display comprising 480 rows by 640 columns.
  • the display 20 comprises 307,200 image pixels (480 rows x 640 columns) and includes a plurality of spaced
  • the display 20 may be used in a wide variety of devices utilizing liquid crystal
  • the display 20 may advantageously be used to display the portions of the display.
  • the display 20 may advantageously be used to display the portions of the display.
  • the display 20 can be fabricated in sizes other than
  • the display 20 of the present invention may be fabricated as an SVGA sized display of 800 rows by 600 columns of image pixels.
  • the display 20 could be fabricated as a 320 row by 240 column display (76,800 pixels), which is a one quarter of VGA display size.
  • the display 20 is a matrix display, it should be appreciated by one skilled in the art that the display could also be a segmented display. In a segmented display, the
  • electrodes may be fabricated in various shapes and disposed in orthogonal or non-orthogonal orientations to generate desired image configurations, for example, in a segmented liquid crystal display short segments of row and column electrodes may advantageously be disposed to create a seven segment numerical display. In other segmented displays electrode segments of irregular shape may be used to generate an icon on the display.
  • the bistable liquid crystal display 20 includes layers 34a, 34b comprised of cholesteric or what is known as chiral nematic liquid crystal material.
  • Cholesteric liquid crystal material is
  • the display 20 is a passive matrix because the horizontal (row) and vertical (column) electrode segments 37, 38, 39, 40 which define the image pixels of the display are passive circuit elements (resistors) as opposed to comprising active circuit elements such as transistors.
  • a passive matrix display, such as the display 20, is advantageous because of lower cost compared to active matrix displays. Passive matrix displays have a much simpler design
  • the display 20 includes a top display 22 and bottom display 24 (preferably, the bottom display 24 is identical in structure to the top display 22) separated by a layer of index of
  • refraction matching material 26 such as an adhesive, a pressure sensitive material, a thermoplastic material or an index matching fluid.
  • the adhesive material may be Norland 65 brand adhesive sold by Norland Optical Adhesives of New Brunswick, New Jersey. A suitable
  • thermoplastic material for use with plastic substrates may be a thermoplastic adhesive such as an adhesive known as Meltmount sold by R.P. Cargile Laboratories, Inc. of Cedar Grove, New Jersey.
  • the top display 22 is closest to or faces a viewer V of the display 20 and the bottom
  • display 24 is "stacked" or disposed vertically below the top display 22, that is, away from the viewer V in a direction shown by the arrow in Figures 1, 2 and 3.
  • the two displays 22, 24 are "stacked" or disposed vertically below the top display 22, that is, away from the viewer V in a direction shown by the arrow in Figures 1, 2 and 3.
  • the two displays 22, 24 are "stacked" or disposed vertically below the top display 22, that is, away from the viewer V in a direction shown by the arrow in Figures 1, 2 and 3.
  • each of the displays 22, 24 has a brightness of approximately 35-40% for reflective portions of displayed images.
  • the brightness of the top display 22 is reinforced by that of the second display 24
  • the stacked display 20 of the present invention results in enhanced brightness of the
  • the upper display 22 is comprised of a first rectangular substrate 30a (closest to the viewer) and a second rectangular substrate 28a, between which is disposed a thin layer of
  • the substrates may be formed of glass (e.g., 0.5 millimeters (mm.) to 1.5 mm. thick) or of plastic (e.g., 0.018 mm. or approximately 7 mils
  • the liquid crystal material may be filled into a cell spacing between substrates of, for example, at least 2 microns, more specifically, from about 4 microns to about 6 microns or even about 10 microns or greater, in a manner known to those skilled in the art.
  • the display 22 may have the same or a different cell spacing than the display 24.
  • the first substrate 30a includes a set of 640 column electrode segments 39 affixed to an inwardly facing surface of the substrate 30a.
  • the set of column electrodes 39 comprise an array of parallel indium tin oxide (ITO) traces coated on the inwardly facing surface.
  • the second substrate 28a includes a set of 480 row electrode
  • the set of row electrodes 37 comprise an array of parallel ITO traces coated on the inwardly facing surface.
  • the lower display 24 is comprised of a first substrate
  • the first substrate 30b includes a set of 640 column electrodes 40 affixed to an inwardly facing surface of the substrate 30b.
  • the set of column electrodes 40 comprise an array of parallel ITO traces coated on the inwardly facing surface.
  • the second substrate 28b includes a set of 480 row electrodes 38 affixed to an
  • the set of row electrodes 38 comprise
  • adsorptive material C is applied such as by painting the back of the display.
  • One suitable material is black paint that absorbs visible light.
  • the sets of row electrodes 37, 38 extend
  • the set of row electrodes 37 of the top display 22 are electrically connected to the set of row electrodes 38 of the bottom display 24 via a
  • column electrodes 39 of the top display 22 are electrically connected to the set of column electrodes 40 of the bottom display 24 via a preferably flexible interconnect 43.
  • Drive electronics are shown schematically in Figure 8 at 200 and comprise a set of row driver circuitry (shown schematically at 202 mounted on a row driver board 202a) and a set of column driver circuitry (shown schematically at 204 mounted on a column driver board 204a).
  • the set of row driver circuitry 202 is connected to either the top display row electrodes 37 or
  • the set of column driver circuitry 204 is
  • the flexible interconnects 43, 44 are advantageous in that they enable the drive electronics 200 comprising a single set of row driver circuitry 202 and column driver circuitry 204 to drive both the row and column electrodes 37, 39 of the top display 22 simultaneously with the row and column electrodes 38, 40 of the bottom display 24.
  • a suitable flexible interconnect is the pressure fastenable Zebra® elastomeric connectors sold by Fujipoly America Corporation of Kenil worth, New Jersey.
  • substrate 30a of the first display 22 are electrically connected to the column electrodes 40 of
  • first step in electrically connecting the column and row electrodes of the two displays because, due to the stepped positioning of the substrates, the electrodes can be easily accessed as shown in Figure 4.
  • the displays 22, 24 are then folded together ( Figure 5) so that the first display 22 moves into registry atop and parallel to the second display 24.
  • the index matching material 26 is disposed between the two displays 22, 24 by spreading it on or by filling.
  • the row electrodes 37 of the bottom substrate 28a of the first display 22 are electrically connected to the row electrodes 38 of the upper substrate 28b of the second display 24 using the connector 44. This is facilitated by the inner substrates
  • the flexible connector 44 is bent around the outside of the protruding or extending portions of the substrates 28a, 28b.
  • the flexible connectors 43 and 44 are preferably electrically connected to the displays in the manner shown in Figures 4-7, the present invention also contemplates and encompasses other ways for connecting the row and column electrodes of one of the displays with the row
  • display driver circuitry 100 includes the
  • the drive electronics 200 comprises the row driver circuitry 202, including row drivers
  • the row and column driver circuitry 202 are mounted on the row driver board 202a, and the column driver circuitry 204, including column drivers mounted on the column driver board 204a.
  • the row and column driver circuitry 202 are mounted on the row driver board 202a, and the column driver circuitry 204, including column drivers mounted on the column driver board 204a.
  • Control voltages are coupled to the respective row and column electrodes using (e.g., heat sealable) interconnects 203, 205
  • the connector 203 is positioned so that electrical traces on the connector 203 are aligned with the column electrodes 40 on the substrate 30b of the second display 24.
  • interconnect material 205 is positioned so that electrical traces on the connector 205 are aligned with the row electrodes 37 on the substrate 28a of the first display 22.
  • connection between the drive electronics and the displays may be in the form of any suitable electrical connectors.
  • One suitable form of connector is a heat sealable connector by Elform, Inc. of
  • interconnects are bonded onto the substrates on the ITO traces in view of the information containing herein and in the Reinke article.
  • Another suitable form of interconnect is KaptonTM connectors by Dow Chemical Company of Midland, Michigan.
  • Yet another interconnect is Zebra® elastomeric connectors by Fujipoly, which have a greater thickness than
  • the row driver 202a is mounted on the row driver board and has its output channels
  • the column driver 204a is mounted on a column driver
  • the row and column driver circuitry 202, 204 is electrically connected to the logic and control unit 150 which includes circuitry that controls the presentation of data on the display 20 by controlling the reflectance state of each pixel in the array of 307,200 pixels that make up
  • a microprocessor controls operations of the circuitry of the control and logic unit 150.
  • each liquid crystal display is constructed so as to accommodate the same voltage levels by selecting at least one of certain material properties such as e, viscosity and pitch length, as well as certain cell spacing.
  • the stacked display 20 of the present invention has principally been described in terms of the electrical connections and drive electronics that enable operation of the display. It will
  • the display 20 may include various suitable components
  • passivation layers surface treatments, contrast improving or color enhancing layers (black or
  • one application is a stacked display in which the lower display reflects
  • infrared radiation and the upper display reflects visible radiation, as disclosed in U.S. Application Serial No. 08/823,329. Any number of visible displays may be stacked above the infrared display and may be driven with the infrared display or may be driven independently from the infrared display and other displays.
  • Another preferred aspect of the invention is a stacked display including a blue
  • At least two of the displays are electrically connected according to the present invention to enable them to be driven together. Additional layers may be used and driven with these layers or driven independently. For example, the blue reflecting layer, the yellow reflecting layer and the infrared reflecting layer may be driven together in accordance with the
  • one or more displays of the stacked assembly may be made to reflect light having any wavelength at various intensities.
  • the color of the visible light reflecting displays can be varied.

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Liquid Crystal (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)

Abstract

La présente invention se rapporte à un appareil d'affichage passif, à empilement, comportant une première et une seconde couche de matière à base de cristaux liquides, nématiques, chiraux. Ledit appareil d'affichage comprend des substrats (30a, 28a, 28b, 30b) reliant la première couche (34a) de matière cristalline liquide et la seconde couche (34b) de matière cristalline liquide de manière à empêcher la communication entre les première et seconde couches de matière cristalline liquide. Des conducteurs électriques (44) relient les premières électrodes de lignes (37) et les secondes électrodes de lignes (38) et des conducteurs électriques (43) relient les premières électrodes de colonnes (39) et les secondes électrodes de colonnes (40). Des éléments électroniques d'attaque de lignes (202) sont électriquement couplés à l'une des premières électrodes de lignes (37) et des secondes électrodes de lignes (38) de manière à appliquer une tension à la fois aux premières électrodes de lignes (37) et aux secondes électrodes de lignes (38). Des éléments électroniques d'attaque de colonnes (204) sont électriquement couplés à l'une des premières électrodes de colonnes (39) et des secondes électrodes de colonnes (40) de manière à appliquer une tension à la fois aux premières électrodes de colonnes (39) et aux secondes électrodes de colonnes (40).
PCT/US1999/030103 1999-02-05 1999-12-16 Afficheurs a cristaux liquides cholesteriques, bistables, a empilement, mettant en oeuvre un ensemble unique d'elements electroniques d'attaque WO2000046636A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24473199A 1999-02-05 1999-02-05
US09/244,731 1999-02-05

Publications (1)

Publication Number Publication Date
WO2000046636A1 true WO2000046636A1 (fr) 2000-08-10

Family

ID=22923903

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/030103 WO2000046636A1 (fr) 1999-02-05 1999-12-16 Afficheurs a cristaux liquides cholesteriques, bistables, a empilement, mettant en oeuvre un ensemble unique d'elements electroniques d'attaque

Country Status (1)

Country Link
WO (1) WO2000046636A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5450222A (en) * 1993-05-27 1995-09-12 Apple Computer, Inc. Electrical connection of devices incorporating multiple liquid crystal cells
US5570216A (en) * 1995-04-14 1996-10-29 Kent Display Systems, Inc. Bistable cholesteric liquid crystal displays with very high contrast and excellent mechanical stability
US5726723A (en) * 1996-01-31 1998-03-10 Technology Research International Corporation Sub-twisted nematic liquid crystal display

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5450222A (en) * 1993-05-27 1995-09-12 Apple Computer, Inc. Electrical connection of devices incorporating multiple liquid crystal cells
US5570216A (en) * 1995-04-14 1996-10-29 Kent Display Systems, Inc. Bistable cholesteric liquid crystal displays with very high contrast and excellent mechanical stability
US5726723A (en) * 1996-01-31 1998-03-10 Technology Research International Corporation Sub-twisted nematic liquid crystal display

Similar Documents

Publication Publication Date Title
JP4746933B2 (ja) カラー電子ペーパー表示装置
US6233029B1 (en) Display device and electronic apparatus using the same having a reflective polarizer between LCD and optical element which emits light responsive to light from polarizer
US7479940B2 (en) Display device with electrical zipper interconnect
Duthaler et al. 53.1: Active‐Matrix Color Displays Using Electrophoretic Ink and Color Filters
US7190337B2 (en) Multi-configuration display driver
US8139050B2 (en) Addressing schemes for electronic displays
CN100437278C (zh) 显示器
KR100200258B1 (ko) 액정 표시 장치 및 그 구동방법
US8232952B2 (en) Display element, method of driving the same, and electronic paper including the same
KR20170030464A (ko) 백플레인 어셈블리들을 위한 멀티-레이어 확장 전극 구조들
US6697131B2 (en) Stacked type reflection liquid crystal display and method for producing the same
EP1923733A1 (fr) Substrat à filtre couleur, dispositif d'affichage électrophorétique comprenant un tel substrat et procédé pour améliorer de la luminance d'un tel dispositif
US7852439B2 (en) Multi-layer display element and manufacturing method for the same
CN101013226A (zh) 透射反射式液晶显示器
CN111352268A (zh) 显示装置
JP4234848B2 (ja) 表示媒体
US7830479B2 (en) Liquid crystal display and electronic paper utilizing the display
CN100416366C (zh) 透射反射式液晶显示器
JP4244446B2 (ja) 情報表示装置及びその駆動方法
TW201940952A (zh) 在ｔ線與像素電極之間具有減少的電容耦合之用於窄邊框電光顯示器背板的介層配置
WO2000046636A1 (fr) Afficheurs a cristaux liquides cholesteriques, bistables, a empilement, mettant en oeuvre un ensemble unique d'elements electroniques d'attaque
US8059251B2 (en) Multilayered cell, electronic terminal, and method of filling multilayered cell with media
WO2003083561A2 (fr) Panneau utilisant des supports reflechissants programmables electroniquement
US6853360B1 (en) Electrode structure for liquid crystal display
CN220357399U (zh) 反射式显示面板及显示装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CN JP

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase