EP0933755A1 - Dispositif à module d'affichage à cristaux liquides, protégé, notamment pour tableau de commande d'une installation de véhicule automobile - Google Patents
Dispositif à module d'affichage à cristaux liquides, protégé, notamment pour tableau de commande d'une installation de véhicule automobile Download PDFInfo
- Publication number
- EP0933755A1 EP0933755A1 EP99101509A EP99101509A EP0933755A1 EP 0933755 A1 EP0933755 A1 EP 0933755A1 EP 99101509 A EP99101509 A EP 99101509A EP 99101509 A EP99101509 A EP 99101509A EP 0933755 A1 EP0933755 A1 EP 0933755A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- output
- display module
- module
- impedance
- branch line
- 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.)
- Granted
Links
Images
Classifications
-
- 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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
Definitions
- the invention relates to the field of control panels with liquid crystal display ("Liquid Crystal Display” in English), especially for motor vehicles.
- This invention relates more particularly to devices for such control panels, which include a display module with multiple inputs connected parallels, via a multiplicity of lines of command, to a multiplicity of outputs of a module control powered by an electrical source, the output of the display module and the electrical source being connected to an electrical ground.
- the control module mainly consists of electronic switches, usually made from of semiconductors which do not support discharges electrostatic above about 2 kV. Now, it happens frequently that discharges well above 2 kV, typically 20 or 25 kV, are generated at the module level liquid crystal display, in particular due to surface constraints that it can undergo.
- the invention provides for this purpose a device of the type described in the introduction, and in which at least one branch line provided, on the one hand, with a connected input to the electrical source, and secondly, to an output connected directly to the output of said display module, the bypass line having a significantly impedance less than that of each pair formed by a line of command and the associated command module output.
- the relationship between the impedance of a couple and the impedance of a bypass line is at least greater than 10. More preferably, this ratio is at less than 100, and even more preferably at less than 1000.
- the output of the display module is preferably connected to ground via a coupling resistor.
- the invention is particularly applicable to devices intended to be part of a control panel of a vehicle heating and / or air conditioning system automobile.
- Figure 1 We first refer to Figure 1 to describe the block diagram of a device according to the invention in non-limiting application to a control panel an air conditioning system for a motor vehicle.
- the device includes a current supply source 1 connected to earth M, for example that of the vehicle, and intended to supply an electronic module 2 comprising a control module 3 and a crystal display module liquids 4.
- Each 5-i command line is itself connected to an output 6-i among N outputs of the control module 3, which constitutes a switch intended manage the power supply of the N parts of the display module 4.
- this control module 3 is capable, on the order of an installation management unit, to supply one or more parts of the display module, or other words to connect the selected 6-i outputs to the circuit supplied by the power source 1.
- control module 3 is produced from semiconductors known to those skilled in the art, that it is therefore unnecessary to describe here.
- the display module 4 includes an output 7 which is connected to a floating mass MF, which is itself connected to earth M via a coupling resistor 8.
- the device comprises a line of bypass 9 mounted in parallel with the electronic module 2 so that its input 10 is connected to the source supply 1, while its output 11 is connected to the floating mass MF at output 7 of the module display 4.
- the device therefore comprises two parallel branches, one comprising the electronic module 2, the other the branch line 9, connected on one side to the source electric 1 and on the other side to the floating mass MF.
- the branch line 9 (or ground line), is chosen so that viewed from the side of the ground, it has an impedance Z M significantly less than an impedance Z A representative of the sum of the impedance of a line of control and output impedance of the switch to which it is connected, viewed from the ground side.
- the expression “output of a switch” is understood here to mean an output 6-i of the control module 3.
- the impedance Z A of the branch containing the electronic module 2 is at least 10 times greater than the value of the impedance Z M of the branch branch 9. More preferably, this value of Z A is at least a hundred times greater than that of Z M , and even more preferably, at least a thousand times greater.
- branch line 9 it is possible, when an electrostatic discharge occurs at the terminals of the display module 4, for example in the event of pressure generated by a user, to evacuate to ground M, via branch line 9, the high voltage generated this discharge.
- the display module 4 and the display module control 3 are produced in the form of an integrated circuit.
- the branch line 9 can be directly connected to a grounding zone 12 formed on the surface of the printed circuit forming the module display 4 and itself connected to output 7. This simplifies the device, since the lines of 5-i and bypass 9 control can be performed from the same way, i.e. in the form of conductors semi-rigid electrics (e.g. metal legs conductive), and together form a connection sheet, as illustrated in Figure 3.
- the control module 3 must include an output of bypass 14 connected directly to its connected input 15 to power source 1, so that input 10 of the branch line 9 can be easily connected to this same source 1.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
Description
- la figure 1 est un schéma de principe d'un dispositif à module d'affichage à cristaux liquides selon l'invention;
- la figure 2 est une variante du schéma de principe de la figure 1; et
- la figure 3 illustre un module d'affichage muni de ses lignes de commande et de dérivation.
Claims (9)
- Dispositif à module d'affichage à cristaux liquides, notamment pour tableau de commande de véhicule automobile, du type comprenant un module d'affichage (4) comportant une multiplicité d'entrées parallèles raccordées, via une multiplicité de lignes de commande (5-i), à une multiplicité de sorties (6-i) d'un module de commande (3) alimenté par une source électrique (1), la sortie (7) dudit module d'affichage (4) et ladite source électrique (1) étant reliées à une masse électrique (M), caractérisé en ce qu'il comprend au moins une ligne de dérivation (9-i) munie d'une entrée (10) raccordée à ladite source électrique (1) et d'une sortie (11) raccordée directement à la sortie (7) dudit module d'affichage (4), ladite ligne de dérivation (9-i) présentant une impédance (ZM) notablement inférieure aux impédances (ZA) respectives de chaque couple formé d'une ligne de commande (5-i) et de la sortie (6-i) du module de commande (3) associée.
- Dispositif selon la revendication 1, caractérisé en ce que le rapport entre l'impédance d'un couple (ZA) et l'impédance d'une ligne de dérivation (ZM) est au moins supérieur à 10.
- Dispositif selon la revendication 2, caractérisé en ce que ledit rapport est au moins supérieur à 100, et en particulier au moins supérieur à 1000.
- Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que la ligne de commande (5-i) est un élément de raccordement conducteur électriquement.
- Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que la ligne de dérivation (9-i) est un élément de raccordement conducteur électriquement.
- Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que le module d'affichage (4) comprend une zone (12-j) de mise à la masse raccordée à sa sortie (7) et à laquelle est raccordée la ligne de dérivation (9-j).
- Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que le module de commande (3) comprend une sortie de dérivation (14) raccordée à son entrée (15) alimentée par la source électrique (1) et agencée pour être raccordée à l'entrée (10) de la ligne de dérivation (9).
- Dispositif selon l'une des revendications 1 à 7, caractérisé en ce que la sortie (7) du module d'affichage (4) est reliée à la masse (M) via une résistance de couplage (8).
- Dispositif selon l'une des revendications 1 à 8, caractérisé en ce qu'il fait partie d'un tableau de commande d'une installation de chauffage et/ou climatisation de véhicule automobile.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9800997 | 1998-01-29 | ||
FR9800997A FR2774203B1 (fr) | 1998-01-29 | 1998-01-29 | Dispositif a module d'affichage a cristaux liquides, protege, notamment pour tableau de commande d'une installation de vehicule automobile |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0933755A1 true EP0933755A1 (fr) | 1999-08-04 |
EP0933755B1 EP0933755B1 (fr) | 2010-03-10 |
Family
ID=9522335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99101509A Expired - Lifetime EP0933755B1 (fr) | 1998-01-29 | 1999-01-28 | Dispositif à module d'affichage à cristaux liquides, protégé, notamment pour tableau de commande d'une installation de véhicule automobile |
Country Status (5)
Country | Link |
---|---|
US (1) | US6317172B1 (fr) |
EP (1) | EP0933755B1 (fr) |
DE (1) | DE69942112D1 (fr) |
ES (1) | ES2342699T3 (fr) |
FR (1) | FR2774203B1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0215125D0 (en) * | 2002-06-28 | 2002-08-07 | Delphi Tech Inc | Control method for a liquid crystal display |
US7310071B2 (en) * | 2002-10-18 | 2007-12-18 | Kopin Corporation | Instrument panel with active display |
TW578446B (en) * | 2003-03-04 | 2004-03-01 | Benq Corp | Electronic device and anti-ESD method thereof |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6318333A (ja) * | 1986-07-11 | 1988-01-26 | Hitachi Ltd | 液晶表示装置 |
DE3736761A1 (de) * | 1987-10-30 | 1989-05-11 | Vdo Schindling | Kombinationsinstrument fuer kraftfahrzeuge |
JPH06186592A (ja) * | 1992-12-22 | 1994-07-08 | Matsushita Electric Ind Co Ltd | 液晶表示装置およびその製造方法 |
EP0717390A2 (fr) * | 1994-12-14 | 1996-06-19 | Canon Kabushiki Kaisha | Dispositif d'affichage comportant un câblage pour une tension de référence |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0121149B1 (fr) * | 1983-03-31 | 1987-09-02 | Koninklijke Philips Electronics N.V. | Connecteur électrique pour cellules d'affichage à cristaux liquides |
DE3800572A1 (de) | 1987-10-30 | 1989-07-20 | Vdo Schindling | Kombinationsinstrument fuer kraftfahrzeuge |
JP3643640B2 (ja) * | 1995-06-05 | 2005-04-27 | 株式会社東芝 | 表示装置及びこれに使用されるicチップ |
-
1998
- 1998-01-29 FR FR9800997A patent/FR2774203B1/fr not_active Expired - Lifetime
-
1999
- 1999-01-27 US US09/238,121 patent/US6317172B1/en not_active Expired - Lifetime
- 1999-01-28 DE DE69942112T patent/DE69942112D1/de not_active Expired - Lifetime
- 1999-01-28 EP EP99101509A patent/EP0933755B1/fr not_active Expired - Lifetime
- 1999-01-28 ES ES99101509T patent/ES2342699T3/es not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6318333A (ja) * | 1986-07-11 | 1988-01-26 | Hitachi Ltd | 液晶表示装置 |
DE3736761A1 (de) * | 1987-10-30 | 1989-05-11 | Vdo Schindling | Kombinationsinstrument fuer kraftfahrzeuge |
JPH06186592A (ja) * | 1992-12-22 | 1994-07-08 | Matsushita Electric Ind Co Ltd | 液晶表示装置およびその製造方法 |
EP0717390A2 (fr) * | 1994-12-14 | 1996-06-19 | Canon Kabushiki Kaisha | Dispositif d'affichage comportant un câblage pour une tension de référence |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 012, no. 224 (P - 721) 25 June 1988 (1988-06-25) * |
PATENT ABSTRACTS OF JAPAN vol. 018, no. 532 (P - 1810) 7 October 1994 (1994-10-07) * |
Also Published As
Publication number | Publication date |
---|---|
ES2342699T3 (es) | 2010-07-12 |
EP0933755B1 (fr) | 2010-03-10 |
FR2774203A1 (fr) | 1999-07-30 |
US6317172B1 (en) | 2001-11-13 |
FR2774203B1 (fr) | 2000-03-31 |
DE69942112D1 (de) | 2010-04-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0793403B1 (fr) | Perfectionnement aux circuits d'illumination à diodes électroluminescentes, notamment pour véhicules automobiles, feu de signalisation et tableau de commande l'incorporant | |
FR2893456A1 (fr) | Systeme de distribution electrique et contacteur embarque modulaire de forte puissance pour celui-ci. | |
FR2721890A1 (fr) | Dispositif a circuit electrique de direction assistee | |
FR2808131A1 (fr) | Connecteur electrique | |
FR3026467A1 (fr) | Module lumineux comportant au moins un composant et un connecteur disposes sur un dissipateur de chaleur, et dispositif d'eclairage pour vehicule automobile comportant un tel module | |
FR2916933A1 (fr) | Dispositif de connexion electrique entre une source d'alimentation electrique et un radiateur electrique, et procede de realisation d'un tel dispositif de connexion | |
EP0554191A1 (fr) | Composant de protection pour un circuit dans une automobile | |
FR2629953A1 (fr) | Composant electrique, notamment moteur electrique, equipe de double paires de contacts, notamment pour autoriser deux implantations differentes sur une plaque a circuits imprimes | |
WO2018078175A1 (fr) | Interface de commande capacitive et rétroéclairée pour véhicule automobile | |
EP0933755B1 (fr) | Dispositif à module d'affichage à cristaux liquides, protégé, notamment pour tableau de commande d'une installation de véhicule automobile | |
FR2745427A1 (fr) | Ensemble se rapportant a un rail conducteur | |
FR3009667A1 (fr) | Procede de fabrication d'une carte de circuit imprime pour retroviseur de vehicule | |
EP4222414A1 (fr) | Module lumineux pour véhicule automobile | |
EP0603026B1 (fr) | Dispositif pour la protection d'une installation électronique contre des perturbations engendrées par des phénomènes affectant le milieu extérieur dans lequel se trouve placée l'installation | |
FR2718569A1 (fr) | Circuit de protection assurant la protection des circuits intégrés contre les décharges électrostatiques (ESD). | |
FR2793990A1 (fr) | Boitier electronique sur plaque et procede de fabrication d'un tel boitier | |
WO2003025591A1 (fr) | Dispositif indicateur de presence tension et appareil electrique comportant un tel indicateur | |
FR2779889A1 (fr) | Detecteur de contact par effet capacitif | |
FR2623319A1 (fr) | Dispositif pour eclairer des dispositifs d'affichage passifs d'informations notamment des dispositifs d'affichage a cristaux liquides | |
EP1309005A1 (fr) | Protection d'un circuit intégré contre des décharges électrostatiques et autres surtensions | |
FR2741230A3 (fr) | Dispositif de connexion | |
EP0241067B1 (fr) | Circuit de filtrage pour dispositif intégré de type métal-oxyde-semiconducteur et son application à un tel dispositif | |
FR3040526A1 (fr) | Element de commutation pour plaque de distribution d'energie electrique et boitier de distribution d'energie electrique dote d'un tel element de commutation | |
EP3288185B1 (fr) | Appareil de commutation électrique comportant un dispositif d'interconnexion électrique amélioré | |
EP1063729A1 (fr) | Connecteur pour lampes à décharge, notamment de véhicule automobile |
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 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES GB IT |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
17P | Request for examination filed |
Effective date: 19991201 |
|
AKX | Designation fees paid |
Free format text: DE ES GB IT |
|
17Q | First examination report despatched |
Effective date: 20061219 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES GB IT |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: VALEO INTERIOR CONTROLS |
|
REF | Corresponds to: |
Ref document number: 69942112 Country of ref document: DE Date of ref document: 20100422 Kind code of ref document: P |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2342699 Country of ref document: ES Kind code of ref document: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20101213 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20110128 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110128 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20170117 Year of fee payment: 19 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20170113 Year of fee payment: 19 Ref country code: ES Payment date: 20170131 Year of fee payment: 19 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 69942112 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180801 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180128 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20190731 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180129 |