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1. EP2333645 - TOUCH PANEL HAVING PRESSING FORCE DETECTING FUNCTION AND PRESSURE SENSITIVE SENSOR FOR TOUCH PANEL

Office European Patent Office
Application Number 09834914
Application Date 24.12.2009
Publication Number 2333645
Publication Date 15.06.2011
Publication Kind B1
IPC
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
F
ELECTRIC DIGITAL DATA PROCESSING
3
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
01
Input arrangements or combined input and output arrangements for interaction between user and computer
03
Arrangements for converting the position or the displacement of a member into a coded form
041
Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
G PHYSICS
01
MEASURING; TESTING
L
MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
1
Measuring force or stress, in general
20
by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
F
ELECTRIC DIGITAL DATA PROCESSING
3
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
01
Input arrangements or combined input and output arrangements for interaction between user and computer
03
Arrangements for converting the position or the displacement of a member into a coded form
041
Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
044
by capacitive means
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
F
ELECTRIC DIGITAL DATA PROCESSING
3
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
01
Input arrangements or combined input and output arrangements for interaction between user and computer
03
Arrangements for converting the position or the displacement of a member into a coded form
041
Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
045
using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
G06F 3/041
G01L 1/20
G06F 3/044
G06F 3/045
CPC
G06F 3/045
G01L 1/205
G02F 1/13338
G06F 3/044
G06F 2203/04105
Applicants NISSHA PRINTING
Inventors SUZUKI TAKAHIRO
KAI YOSHIHIRO
ENDO YUKO
TAKAI YUICHIRO
SHIMIZU JUN
YAMAOKA YOSHITAKA
OKUMURA SHUZO
HIRAI SEIKO
IMAI YOHKO
Designated States
Priority Data 2008330284 25.12.2008 JP
2008330288 25.12.2008 JP
2009047006 27.02.2009 JP
2009071386 24.12.2009 JP
Title
(DE) BERÜHRUNGSPANEL MIT DRUCKKRAFTERKENNUNGSFUNKTION UND DRUCKEMPFINDLICHER SENSOR FÜR EIN BERÜHRUNGSPANEL
(EN) TOUCH PANEL HAVING PRESSING FORCE DETECTING FUNCTION AND PRESSURE SENSITIVE SENSOR FOR TOUCH PANEL
(FR) ECRAN TACTILE POSSÉDANT UNE FONCTION DE DÉTECTION DE LA FORCE DE PRESSION ET CAPTEUR SENSIBLE À LA PRESSION POUR ÉCRAN TACTILE
Abstract
(EN)
An object of the present invention is to provide a touch panel having a press detection function, which makes it possible to suppress degradation of visibility of a display unit of a display device even when mounted on an electronic device, and also to improve a pressure measuring precision. For this purpose, the touch panel of the present invention includes a first substrate, J a second substrate disposed oppose to the first substrate, a pair of electrodes disposed on either one of opposed surfaces of the respective substrates or disposed separately on both of the surfaces, pressure sensitive ink members disposed with a gap from at least one of the pair of electrodes, each of the pressure sensitive ink members having an electrical characteristic varied-by a pressing force applied thereto, and a gap retaining member for bonding the first and second substrates to each other and for retaining a gap between each of the pressure sensitive inks and at least one of the pair of electrodes, wherein the pair of electrodes are disposed in a frame shape along an edge portion of the first or second substrate, and the pressure sensitive ink members are scattered along the edge portion of the first or second substrate so that, when the first or second substrate is deformed upon an application of an external force, at least one of them is made in contact with both of the pair of electrodes so as to make the two electrodes conductive to each other.

(FR)
La présente invention a pour objet un écran tactile possédant une fonction de détection de la force de pression, l'écran tactile étant capable de réduire la détérioration de la visibilité d'une unité d'affichage d'un dispositif d'affichage et d'améliorer la précision de la mesure de pression même lorsqu'il est installé dans un dispositif électronique. L'écran tactile est pourvu d'un premier substrat, d'un second substrat qui est disposé à l'opposé du premier substrat, d'une paire d'électrodes qui sont soit disposées sur l'une des deux surfaces opposées des substrats respectifs, soit disposées respectivement sur les deux surfaces opposées des substrats respectifs, d'un organe de tracé sensible à la pression qui est disposé en respectant un espace avec la ou les électrodes de la paire d'électrodes et possède des caractéristiques électriques qui changent en fonction de la force de pression appliquée, et d'un élément d'écartement par lequel les premier et second substrats sont reliés et qui maintient un espace entre l'organe de tracé sensible à la pression et la ou les électrodes de la paire d'électrodes, la paire d'électrodes étant disposée en forme de cadre le long du bord du premier ou du second substrat, et les organes de tracé sensibles à la pression étant éparpillés le long du bord du premier ou du second substrat et conçus de telle sorte que lorsque le premier ou le second substrat est déformé par l'application d'une for