EP1346312A2 - Affichage presentant une couche electroconductrice - Google Patents

Affichage presentant une couche electroconductrice

Info

Publication number
EP1346312A2
EP1346312A2 EP01991648A EP01991648A EP1346312A2 EP 1346312 A2 EP1346312 A2 EP 1346312A2 EP 01991648 A EP01991648 A EP 01991648A EP 01991648 A EP01991648 A EP 01991648A EP 1346312 A2 EP1346312 A2 EP 1346312A2
Authority
EP
European Patent Office
Prior art keywords
display
liquid crystal
electrically conductive
conductive layer
display according
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP01991648A
Other languages
German (de)
English (en)
Inventor
Peter Brandt
Thomas Brohm
Gerhard Wesner
Michael Zimmermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1346312A2 publication Critical patent/EP1346312A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0444—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single conductive element covering the whole sensing surface, e.g. by sensing the electrical current flowing at the corners
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display

Definitions

  • the invention relates to a display with an electrically conductive layer.
  • Displays with an electrically conductive layer are known in the prior art and are used to design the display as a so-called “touch screen” or to heat it, for example in the case of liquid crystal displays. B. may occur when used in motor vehicles, to be able to switch quickly and thus to prevent a sluggish display.
  • a “touch screen” is known in the prior art and is used to be able to select menus, submenus, values or icons displayed on a screen by touching the respective display with a finger or other input means.
  • an analog resistive touch screen is a hardened glass pane arranged with an electrically conductive coating having a uniform electrical resistance. a sheet of polyester prior to display tightly stretched over this glass top, and separated by small transparent insulating dots from it. the variable film has' a hard, durable coating on the A conductive and highly transparent indium-tin-oxide coating on the outside and inside. Even with a light touch, the conductive coating establishes an electrical connection with the coating on the glass.
  • An integrated controller applies a voltage gradient to the conductive coating
  • the voltages at the contact point represent the touched position using analog values.
  • the controller digitizes these voltages and sends them to a processing device to determine the touch positions.
  • a capacitive touch screen consists of a clear pane that has been coated with a resistive capacitive and an insulating material.
  • An electromagnetic field is generated over the disc. When a conductive object, such as a finger or metal pen, touches and grounds the screen, the electromagnetic field is changed. The location of the contact can be deduced from the change in the electromagnetic field.
  • Displays and the driver circuits controlling them are operated at high frequencies. This can lead to undesired electromagnetic interference in the area surrounding the displays.
  • a display in an instrument cluster of a motor vehicle for. B. the radio reception and / or cell phone reception in the motor vehicle.
  • the object of the invention is therefore to provide a display with an electrically conductive layer which causes as few electromagnetic disturbances as possible and does not pass electromagnetic disturbances caused by the control electronics and which is simple and inexpensive.
  • this object is achieved in that the electrically conductive layer is connected to a shield potential in terms of radio frequency. This ensures that the electrically conductive layer is at the shielding potential in terms of high frequency and thus prevents the passage of high frequencies.
  • the high-frequency connection can be made, for example, with capacitors which are arranged between the electrically conductive layer and the shield potential, a connection of the capacitor being connected to the electrically conductive layer and a connection being connected to the shield potential.
  • the shielding potential can be realized, for example, by a metal housing or by a metallized housing, the housing being closed by the display. Depending on the required shielding effect, it may be sufficient to connect the liquid crystal display to a ground potential by radio frequency.
  • the electrically conductive layer can be constructed from indium tin oxide (ITO), which covers the display area.
  • ITO indium tin oxide
  • the electrically conductive layer can be configured as a heating device through which a heating current flows. It is also possible to implement the heating device by means of current-conducting tracks which are arranged individually or in a meandering shape. If these tracks run between the electrodes of the liquid crystal cells and consist of indium tin oxide, they can be produced in one operation with the electrodes of the liquid crystal cells.
  • the electrically conductive layer can be designed as part of a touch screen.
  • the display can be configured, for example, as a liquid crystal display, OLED display or as a monitor.
  • the display is designed as a liquid crystal display and an electrically conductive layer of a touch screen is arranged in front of it, the electrically conductive layer can also be used at the same time as heating the liquid crystal display.
  • FIG. 1 shows a partial section of a liquid crystal cell with a surface-mounted heater and the connection to a screen potential
  • Figure 2 is an exploded view of a front and back wall of a liquid crystal cell
  • FIG. 3 shows the section through a liquid crystal cell and a screen housing
  • Figure 4 shows a touch screen with a monitor in an exploded view.
  • a liquid crystal cell 1 has a front wall 2a and a rear wall 2b.
  • flat heating layers 3a, 3b are applied, each of which is separated from the front and rear electrodes 5a, 5b by insulation 4a, 4b.
  • the front and rear electrodes 5a, 5b are finally separated from a liquid crystal substance 7 by insulation 6a, 6b.
  • the front and rear heating layers 3a, 3b are connected to a ground potential M via contact terminals 8a, 8b, electrical conductors 9a, 9b, capacitors 10a, 10b.
  • High-frequency interference striking the heating layers 3a, 3b can be conducted to the ground potential M via the contact terminals 8a, 8b, electrical conductors 9a, 9b, capacitors 10a, 10b.
  • An adhesive bond 11 connects the front wall 2a to the rear wall 2b and prevents the liquid crystal substance 7 from escaping.
  • a front wall 12a and a rear wall 12b of another liquid crystal cell can be seen in FIG.
  • Electrodes 13a are arranged on the front wall 12a and electrodes 13b are arranged on the rear wall 12b. Between the electrodes 13a Heating wires 14a are arranged at the front wall 12a, which are connected to one another via contact pins 15 and connections 16a arranged on the rear wall 12b and are thus connected in series. Between the electrodes 13b of the rear wall, heating wires 14b are arranged, which are also connected via contact pins (not shown) and connections 16b arranged on the front wall 12a and are thus connected in series. The heating wires 14a, 14b are connected to a shield potential (not shown) via connections 17a, 17b.
  • the arrangement of the heating wires 16a, 16b at right angles to one another results in an overall lattice-shaped arrangement of the heating wires 16a, 16b with respect to one another, so that in the case of a high-frequency connection to a shielding potential, high frequencies are prevented by a display which the components shown in FIG. 2 prevent having.
  • FIG 3 shows a liquid crystal cell 1 with a heater, not shown, which can be designed like the heaters of the liquid crystal cells shown in Figure 1 or 2.
  • the heating device is electrically connected to a shield housing 20 via contact terminals 8a, 8b and capacitors 10a, 10b.
  • the shield housing 20 can be made of metal or coated with a metal.
  • the interior of the shield housing 20 is largely separated from the surroundings of the shield housing in terms of radio frequency. No external interference can penetrate into the interior. Likewise, disturbances caused by a control circuit 21 cannot escape to the outside and thus do not disturb devices in the vicinity of the liquid crystal cell 1.
  • the 4 shows a monitor 21, a glass layer 22, transparent metal films 23, 24, an electron grid 25 and a glass layer 26.
  • the glass layer 22 is vapor-coated with the metal films 23, 24.
  • the electron grid 25 is evaporated on the metal film 23 in the edge region.
  • the glass layer 26 is applied to protect the touch screen.
  • the electron grid 25 will have a low alternating voltage at all four corners. created. If you now touch the screen surface with a finger, the potential of the finger attracts a tiny amount of charge from each corner point. Since the current flow from four corners of the touch screen is proportional to the distance between the corner and the point of contact, the exact point at which the touch screen was touched can be calculated, and thus the menu, submenu, value or icon displayed for this area of the monitor to be selected.
  • the metal film 24 is connected to the ground potential M via a capacitor 10. High-frequency electromagnetic radiation from the monitor or another display instead of the monitor 21 is thus shielded.
  • the metal film 24 can be used simultaneously for heating the liquid crystal display.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

L'invention concerne un affichage (1) présentant une couche électroconductrice (3a, 3b, 14a, 14b), ladite couche électroconductrice (3a, 3b, 14a, 14b) étant reliée à un potentiel à effet d'écran (M, 20) de manière à modérer les hautes fréquences.
EP01991648A 2000-12-23 2001-12-20 Affichage presentant une couche electroconductrice Withdrawn EP1346312A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10064921 2000-12-23
DE10064921A DE10064921A1 (de) 2000-12-23 2000-12-23 Flüssigkristallanzeige mit einer Heizvorrichtung
PCT/DE2001/004811 WO2002052495A2 (fr) 2000-12-23 2001-12-20 Affichage presentant une couche electroconductrice

Publications (1)

Publication Number Publication Date
EP1346312A2 true EP1346312A2 (fr) 2003-09-24

Family

ID=7668910

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01991648A Withdrawn EP1346312A2 (fr) 2000-12-23 2001-12-20 Affichage presentant une couche electroconductrice

Country Status (5)

Country Link
US (1) US7259809B2 (fr)
EP (1) EP1346312A2 (fr)
JP (1) JP4149811B2 (fr)
DE (1) DE10064921A1 (fr)
WO (1) WO2002052495A2 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4316960B2 (ja) * 2003-08-22 2009-08-19 株式会社半導体エネルギー研究所 装置
US8009262B2 (en) * 2005-02-14 2011-08-30 American Panel Corporation Flat panel display wtih external integral heater
US8502800B1 (en) 2007-11-30 2013-08-06 Motion Computing, Inc. Method for improving sensitivity of capacitive touch sensors in an electronic device
DE102009031039B4 (de) 2009-06-30 2015-12-31 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Flüssigkristallanzeige mit mehreren Ansteuersegmenten
EP2306280B1 (fr) 2009-10-01 2017-11-29 Siemens Aktiengesellschaft Agencement de capteur sensible au contact et dispositif d'affichage
EP2385448B1 (fr) 2010-05-05 2013-03-13 Siemens Aktiengesellschaft Agencement de capteur sensible au contact
CN104216590B (zh) * 2014-09-05 2016-03-30 努比亚技术有限公司 移动终端及其操作方法
CN104965615B (zh) * 2015-06-24 2018-03-06 上海与德通讯技术有限公司 一种去水汽方法及系统
US10474289B2 (en) 2016-04-07 2019-11-12 GM Global Technology Operations LLC Touchscreen panel with heating function
CN106019678B (zh) * 2016-08-04 2020-03-06 京东方科技集团股份有限公司 一种触控显示装置及其制备方法

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2934503A1 (de) * 1979-08-25 1981-03-26 VDO Adolf Schindling AG, 60326 Frankfurt Elektrische heizeinrichtung fuer eine fluessigkristallzelle
BE881912A (fr) * 1980-02-26 1980-06-16 Haens Joseph P M D Werkwijze voor het verwezenlijken van uitleeseenheden uit vloeibare kristallen met geintegreerde aanstuureenheid en uitleeseenheden
JPS57148722A (en) 1981-03-10 1982-09-14 Nissan Motor Co Ltd Liquid crystal display device
JPS60119525A (ja) 1983-12-01 1985-06-27 Canon Inc 液晶の配向制御法
JPS60114824A (ja) 1983-11-25 1985-06-21 Canon Inc カイラルスメクティック液晶の配向制御方法
JPS60118823A (ja) 1983-11-30 1985-06-26 Canon Inc カイラルスメクティック液晶の配向制御方法
JPS60115915A (ja) 1983-11-28 1985-06-22 Canon Inc 液晶の配向制御法及びその方法で用いる素子
US4781441A (en) 1983-11-25 1988-11-01 Canon Kabushiki Kaisha Method of controlling orientation of liquid crystal, device used therein and liquid crystal device produced thereby
JPS62249221A (ja) 1986-04-23 1987-10-30 Wacom Co Ltd 位置検出装置
SE464899B (sv) * 1989-04-25 1991-06-24 Henicor Assets Sa Jordavledare
JPH0345985A (ja) 1989-07-14 1991-02-27 Hitachi Ltd 液晶表示装置
SE467432B (sv) * 1990-05-23 1992-07-13 Magnus Wilhelm Foervaltnings A Anordning foer skaermning av faelt
JPH05173153A (ja) 1991-12-19 1993-07-13 Fuji Photo Film Co Ltd 液晶表示素子
JPH05196951A (ja) * 1992-01-17 1993-08-06 Fuji Photo Film Co Ltd 液晶表示素子
US6476798B1 (en) 1994-08-22 2002-11-05 International Game Technology Reduced noise touch screen apparatus and method
JPH10282896A (ja) 1997-04-07 1998-10-23 Mitsubishi Electric Corp 表示装置
US6128053A (en) 1997-10-22 2000-10-03 Mannesmann Vdo Ag Liquid crystal display with heater
DE19848547A1 (de) * 1997-11-07 1999-05-12 Mannesmann Vdo Ag Anzeigeeinrichtung
US6081259A (en) * 1997-11-25 2000-06-27 Lsi Logic Corporation Method and apparatus for reducing noise in an electrostatic digitizer
KR100296010B1 (ko) * 1998-06-30 2001-10-26 구본준, 론 위라하디락사 휴대용정보처리장치
US6278444B1 (en) * 1998-08-21 2001-08-21 Geoffrey D. Wilson Low current four-wire interface for five-wire resistive touch-screen
DE19848010C2 (de) * 1998-10-19 2001-06-28 Siemens Ag Flüssigkristall-Anzeigeeinrichtung mit elektromagnetischer Schirmung
JP2000193955A (ja) 1998-12-28 2000-07-14 Optrex Corp 液晶表示素子
US6181394B1 (en) * 1999-01-22 2001-01-30 White Electronic Designs, Corp. Super bright low reflection liquid crystal display
JP2000284255A (ja) 1999-03-30 2000-10-13 Matsushita Electric Ind Co Ltd 液晶温度測定方式

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02052495A2 *

Also Published As

Publication number Publication date
US7259809B2 (en) 2007-08-21
US20040075786A1 (en) 2004-04-22
JP2004516685A (ja) 2004-06-03
JP4149811B2 (ja) 2008-09-17
WO2002052495A2 (fr) 2002-07-04
WO2002052495A3 (fr) 2003-02-27
DE10064921A1 (de) 2002-07-18

Similar Documents

Publication Publication Date Title
DE10359890B4 (de) Touch-Panel für eine Anzeigevorrichtung und Verfahren zu dessen Herstellung
DE10307217B4 (de) Tür mit Sichtfenster für Mikrowellengeräte
DE102006063082B3 (de) Zweidimensionaler Positionssensor
DE102004026672B4 (de) Berührungsschalteinrichtung
DE102008050216B4 (de) Berührungsempfindliche Anzeige mit einzelner Schicht
WO2010149543A1 (fr) Agencement d'électrodes pour dispositif d'affichage
WO2002052495A2 (fr) Affichage presentant une couche electroconductrice
WO2012032432A1 (fr) Dispositif de commande d'appareil ménager
EP3513124B1 (fr) Dispositif de commande d'un ustensile de cuisine intégré
EP2385448B1 (fr) Agencement de capteur sensible au contact
EP3602786B1 (fr) Appareil électroménager comportant un écran tactile capacitif blindé contre les interférences électromagnétiques et procédé pour le réaliser
DE60101776T2 (de) Berührungsempfindlicher Bildschirm mit einer Konfiguration überlagerter Elektroden
EP2748368A2 (fr) Appareil électroménager équipé d'un dispositif de commande et d'affichage tactile
EP3369179A1 (fr) Commutateur tactile capacitif
EP2600064B1 (fr) Dispositif de commande
EP2664065B1 (fr) Unité de commande pour un appareil de véhicule
WO2014180831A1 (fr) Électrode en couche pour écran tactile
EP3230829B1 (fr) Élément d'entrée pour appareils électroniques
DE10043110B4 (de) Anzeigevorrichtung mit einer transparenten Abdeckung
DE102018210760A1 (de) Anzeigeeinrichtung für ein Programmiergerät
EP3090328A1 (fr) Appareil et/ou procédé
DE102009031039B4 (de) Flüssigkristallanzeige mit mehreren Ansteuersegmenten
EP2567308A1 (fr) Dispositif pour appareil ménager
DE202010012434U1 (de) Dateneingabegerät

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030528

AK Designated contracting states

Kind code of ref document: A2

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

RBV Designated contracting states (corrected)

Designated state(s): DE FR IT

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: CONTINENTAL AUTOMOTIVE GMBH

17Q First examination report despatched

Effective date: 20100330

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140701