WO2004021077B1 - A rewritable sign system - Google Patents

A rewritable sign system

Info

Publication number
WO2004021077B1
WO2004021077B1 PCT/US2003/025532 US0325532W WO2004021077B1 WO 2004021077 B1 WO2004021077 B1 WO 2004021077B1 US 0325532 W US0325532 W US 0325532W WO 2004021077 B1 WO2004021077 B1 WO 2004021077B1
Authority
WO
WIPO (PCT)
Prior art keywords
rewritable
conductors
cholesteric liquid
liquid crystal
panel
Prior art date
Application number
PCT/US2003/025532
Other languages
French (fr)
Other versions
WO2004021077A1 (en
Inventor
Bobby Dean Landreth
Steven D Pratt
Robert W Pennisi
Ronald J Kelley
Sivakumar Muthuswamy
David S Fredley
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Priority to AU2003262692A priority Critical patent/AU2003262692A1/en
Publication of WO2004021077A1 publication Critical patent/WO2004021077A1/en
Publication of WO2004021077B1 publication Critical patent/WO2004021077B1/en

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
    • G02F1/13476—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 at least one liquid crystal cell or layer assumes a scattering state
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3622—Control of matrices with row and column drivers using a passive matrix
    • G09G3/3629—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals
    • 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
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal 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
    • G02F1/137—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
    • G02F1/13718—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 a change of the texture state of a cholesteric liquid crystal
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/08—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 light absorbing layer
    • 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
    • G02F2203/00—Function characteristic
    • G02F2203/34—Colour display without the use of colour mosaic filters

Abstract

Rewritable signs (100, 1300) that include bistable cholesteric liquid crystal layers (102, 1402, 1404, 1406) are provided. According to one embodiment a rewritable sign (100) is devoid of circuitry for establishing electric fields in localize regions for writing information to the rewritable sign (100), and is consequently inexpensive. In the latter embodiment, a separate information writer (400) that includes an array of pixel electrodes (404) that is driven by an active matrix (602) is used to write information on the rewritable sign. According to another embodiment a rewritable sign (1300) includes three cholesteric liquid layers (1402, 1404, 1406) each of which reflects a different primary color. The three cholesteric liquid crystal layers (1402, 1404, 1406) are interleaved with sets of conductive lines (1316, 1320, 1322, 1324) that are used to apply signals to the cholesteric liquid crystal layers (1402, 1404, 1406) for the purpose of writing information.

Claims

-22-AMENDED CLAIMS[received by the International Bureau on 19 March 2004 (19.03.04); original claims 1, 3, 5, 6, 7, 10 amended; remaining claims unchanged (3 pages)]
1. A rewritable sign system comprising: a rewritable sign comprising: a first transparent panel, a second panel, a cholesteric liquid crystal layer disposed between the first transparent panel and the second panel; and an information writer that is external to the rewritable sign and comprises: an information input, a plurality of electrodes adapted to establish localized electric fields through the cholesteric liquid crystal layer when the information writer is in proximity to the rewritable sign, and one or more electrical circuits coupled between the information input and the plurality of electrodes.
2. The rewritable sign system according to claim 1 wherein: the plurality of electrodes comprise an array of pixel electrodes.
3. The rewritable sign system according to claim 2 wherein: the one or more electrical circuits comprise an active matrix.
4. The rewritable sign system according to claim 3 wherein: the one or more electrical circuits further comprise: a driver coupled to the active matrix wherein in the driver is adapted to apply one of a plurality of signals to the active matrix in response to information received through the information input,
5. A rewritable information presentation medium comprising: a first transparent panel comprising: a first side, and a second side; a second panel comprising: a first side, and a second side; a first cholesteric liquid crystal layer disposed between the first transparent panel and the second panel, the first cholesteric liquid crystal layer including: a first side of the cholesteric liquid crystal layer that faces the second side of the first transparent panel, and a second side of the cholesteric liquid crystal layer that faces the first side of the second transparent panel; and a first plurality conductors for applying electric fields to the first cholesteric liquid crystal layer, the first plurality of conductors including first terminal portions that are adapted to electrically and disengageably couple to an extemal drive signal source for establishing localized electric fields to the cholesteric liquid crystal layer.
6. The rewritable information presentation medium according to claim 5: wherein the first plurality of conductors are transparent and are supported on the first transparent panel; and further wherein the rewritable information presentation medium further comprises: a second plurality of conductors that are supported on the second panel proximate the second side of the cholesteric liquid crystal layer, and include second terminal portions adopted for disengageably coupling to the drive signal source. -24-
7, The rewritable information presentation medium according to claim 6 wherein: the first plurality of conductors are supported on the first side of the first transparent panel; and the second panel includes a margin that extends peripherally beyond the first panel; the second plurality of conductors are supported on the first side of the second panel, and the second plurality of conductors include terminal portions that are located on the margin.
8, The rewritable information presentation medium according to claim 6 wherein: the first plurality of conductors comprise a first set of linear conductors that are parallel to each other; and the second plurality of conductors comprise a second set of linear conductors that are parallel to each other and perpendicular to the first set of linear conductors.
9. A rewritable information presentation system comprising the rewritable information presentation medium according to claim 7 and further comprising: an information writer including: one or more electrical circuits for generating signals for writing information to the rewritable information presentation medium; a plurality of contacts coupled to the one or more electrical circuits, wherein the plurality of contacts are adapted for disengageably coupling to the first terminal portions of the first plurality of conductors and to the second terminal portions of the second plurality of conductors.
10. A rewritable information presentation medium as recited in claim 5 comprising a wireless communication device.
PCT/US2003/025532 2002-08-29 2003-08-14 A rewritable sign system WO2004021077A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003262692A AU2003262692A1 (en) 2002-08-29 2003-08-14 A rewritable sign system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/232,787 2002-08-29
US10/232,787 US6888607B2 (en) 2002-08-29 2002-08-29 Rewritable sign system

Publications (2)

Publication Number Publication Date
WO2004021077A1 WO2004021077A1 (en) 2004-03-11
WO2004021077B1 true WO2004021077B1 (en) 2004-05-06

Family

ID=31977080

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/025532 WO2004021077A1 (en) 2002-08-29 2003-08-14 A rewritable sign system

Country Status (3)

Country Link
US (1) US6888607B2 (en)
AU (1) AU2003262692A1 (en)
WO (1) WO2004021077A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7683855B2 (en) * 2004-05-21 2010-03-23 Industrial Technology Research Institute Electronic signage
GB2419215A (en) * 2004-10-14 2006-04-19 Magink Display Technologies In Display device
EP1647858A1 (en) * 2004-10-18 2006-04-19 Ecsibeo Ab Cholesteric liquid crystal display (LCD) device, and method for its production
TWI317828B (en) * 2004-12-07 2009-12-01 Ind Tech Res Inst Method and device of color cholesteric liquid crystal
US7642528B2 (en) 2007-05-30 2010-01-05 Motorola, Inc. Portable electronic device having appearance customizable housing
JP5452290B2 (en) * 2010-03-05 2014-03-26 ラピスセミコンダクタ株式会社 Display panel
CN112180628A (en) * 2020-09-11 2021-01-05 山东蓝贝思特教装集团股份有限公司 Liquid crystal writing device, local erasing method and display method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6262672B1 (en) * 1998-08-14 2001-07-17 General Electric Company Reduced cost automatic meter reading system and method using locally communicating utility meters
US6379850B1 (en) * 1998-06-25 2002-04-30 Minolta Co., Ltd. Rewritable thermosensible recording material, a production method thereof and a rewritable thermosensible recording medium
JP3599089B2 (en) * 1998-11-11 2004-12-08 富士ゼロックス株式会社 Multi-color display
EP1074863B1 (en) * 1999-08-04 2015-03-04 Asulab S.A. Bragg reflection optical device and methods of making the same

Also Published As

Publication number Publication date
AU2003262692A1 (en) 2004-03-19
US20040041971A1 (en) 2004-03-04
US6888607B2 (en) 2005-05-03
WO2004021077A1 (en) 2004-03-11

Similar Documents

Publication Publication Date Title
US4549174A (en) Electrode terminal assembly on a multi-layer type liquid crystal panel
KR850007528A (en) Capacitive Switches and Switch Arrays
US20040263759A1 (en) Display device
TW364987B (en) A method and a circuit for driving a display device
WO2004021077B1 (en) A rewritable sign system
CN107505788B (en) Touch control display device
EP1658605A1 (en) Display device with flexible substrate and shift register
JPH10209581A (en) Printed wiring board, liquid crystal display and electronic apparatus
CN104483768A (en) Display panel, method for manufacturing display panel, and display device
JP2001312227A (en) Electronic paper file
JP3850510B2 (en) Display device
JP4112675B2 (en) Liquid crystal driving IC, liquid crystal driving IC substrate, and liquid crystal driving device using them
CN113589611B (en) Array substrate, display panel and display device
JPH02248926A (en) Liquid crystal display device
JPH09269498A (en) Liquid crystal display device and electronic equipment
KR100754123B1 (en) Liquid crystal display device
CN215895190U (en) Narrow frame structure of cholesterol liquid crystal display
JPH0434548Y2 (en)
JP2004192314A (en) Ic card with information display means and its manufacturing method
US20230095839A1 (en) Array substrate, display panel and driving method thereof
KR100816302B1 (en) Liquid crystal display device
JP2001264797A (en) Liquid crystal display device
JPH11281961A (en) Driving method for color liquid crystal display element
CN201662825U (en) Intelligent card with electrophoretic display structure
KR20040048695A (en) Flexible printed circuit board and liquid crystal display having the same

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
B Later publication of amended claims

Effective date: 20040319

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP