(19)
(11)EP 2 857 940 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
06.05.2020 Bulletin 2020/19

(21)Application number: 13724494.3

(22)Date of filing:  08.01.2013
(51)Int. Cl.: 
G06F 3/041  (2006.01)
G06F 3/044  (2006.01)
(86)International application number:
PCT/CN2013/070193
(87)International publication number:
WO 2013/177956 (05.12.2013 Gazette  2013/49)

(54)

TOUCH SENSOR, TOUCHSCREEN AND DISPLAY

BERÜHRUNGSSENSOR, BERÜHRUNGSBILDSCHIRM UND ANZEIGE

CAPTEUR TACTILE, ÉCRAN TACTILE ET AFFICHAGE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 29.05.2012 CN 201220246592 U

(43)Date of publication of application:
08.04.2015 Bulletin 2015/15

(73)Proprietor: Beijing BOE Optoelectronics Technology Co., Ltd.
Beijing 100176 (CN)

(72)Inventor:
  • REN, Tao
    Beijing 100176 (CN)

(74)Representative: Brötz, Helmut et al
Rieder & Partner mbB Patentanwälte - Rechtsanwalt Corneliusstrasse 45
42329 Wuppertal
42329 Wuppertal (DE)


(56)References cited: : 
EP-A2- 2 447 815
CN-A- 102 200 856
CN-A- 102 455 820
US-A1- 2009 160 824
US-A1- 2011 057 887
US-A1- 2012 007 827
EP-A2- 2 447 816
CN-A- 102 200 858
CN-A- 102 467 293
US-A1- 2011 007 020
US-A1- 2011 304 578
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    TECHNICAL FIELD



    [0001] Embodiments of the present invention relate to a touch sensor, a touch screen as well as a display device.

    BACKGROUND



    [0002] With the advancement of science and technology, touch screens have been widely applied to display devices. An existing touch screen comprises touch sensors therein, and for example, Fig.1 is a top view of one of such touch sensors.

    [0003] The touch sensor comprises a horizontal metal layer 114, a vertical metal layer 115, and a metal bridge 111 for connecting horizontal metal layers 141 on two sides in the horizontal direction, which are used for transmitting signals when the touch screen is contacted by an object. In the technology for manufacturing the above touch sensor, because an insulating layer 122 is provided between the metal bridge 111 and the horizontal and vertical metal layers 114 and 115, for making the two ends of the metal bridge 111 contact with the horizontal metal layers 114, the insulating layer 122 between the both ends of the metal bridge 111 and the horizontal metal layers 114 has to be etched off to form through holes 112, through which the horizontal metal layers 114 on both sides are conducted via the metal bridge 111. The sectional structure taken along the A'A direction of Fig.1 is shown in Fig.2.

    [0004] The process for manufacturing the above touch sensor is described as follows.

    [0005] Step A, forming a layer of metal material on a substrate and then etching the same to form a metal bridge 111;

    [0006] Step B, forming a layer of PVX on the metal bridge, and then etching the same to form an insulating layer with through holes 112; the positions of the through holes 112 are, as shown in Fig.1, at the ends of the metal bridge 111 from the above;

    [0007] Step C, forming a layer of indium tin oxides ITO on the insulating layer, and then etching the same to form the vertical metal layer 115 and the horizontal metal layer 114.

    [0008] The sectional structure along the B'B direction of Fig.1 is shown in Fig.3; and since the touch sensor is obtained through forming material layers one by one in sequence from down to top and then etching the layers, slope angles 121 will be produced during these processes, and for example the slope angles 121 produced at the lateral edges of the horizontal metal layer 114 and the vertical metal layer 115. In operation, a large amount of charges can accumulate at the slope angles 121 of the horizontal metal layer 114 and the vertical metal layer 115 during signal transmitting; if static electricity occurs when an object contacts with the touch screen, the static electricity may conduct with the charges and thus undermine the vertical metal layer, thus the vertical metal layer cannot transmit signals any more, and further the whole touch screen is impaired.

    [0009] US 2011/304578 A1 discloses a touch panel 100 including: a transparent substrate 10, first electrode patterns 20 that are formed on one surface of the transparent substrate 10 and include a plurality of first sensing units 23 and connecting units 25 connecting adjacent first sensing units 23, and second electrode patterns 30 that are formed on one surface of the transparent substrate 10 vertically with the first electrode patterns 20 and include a plurality of second sensing units 33 and bridges 35 connecting the adjacent second sensing units 33 to be spaced apart from the connecting units 25, wherein the bridge 35 is divided to form two or more bridge patterns 37. The bridge is divided to form two or more bridge patterns so that a user cannot recognize the bridge, thereby making it possible to improve visibility of the touch panel.

    [0010] US 2009/160824 A1 discloses a two-dimensional sensory structure for a capacitive touch panel. The two-dimensional sensory structure includes a substrate having plural first metal structures and second metal structures on a first surface thereof, a dot-like insulating layer located on the substrate and composed of plural insulating dots, and an electrode layer located on the dot-like insulating layer and composed of plural conductive traces. The insulating dots are each corresponding to the first metal structures respectively, and thereby a first portion of the conductive traces arranged along a first direction are electrically connected to each other, and the conductive traces that are arranged along a second direction are electrically insulated therefrom.

    [0011] EP 2447815 A2 discloses a touch screen panel comprising a first sensing pattern provided with first sensing cells arranged on one row along a first direction on a transparent substrate, and a first connection pattern through which adjacent first sensing cells are electrically connected to each other. A second sensing pattern is provided with second sensing cells arranged on one column along a second direction on the transparent substrate so as to be spaced apart from the first sensing cells, and a second connection pattern through which adjacent second sensing cells are electrically connected to each other. In the touch screen panel, the first connection pattern includes at least two pairs of metal patterns arranged so as to be spaced apart from one another, and a transparent pattern formed in the shape of an island in the second sensing pattern so as to be electrically connected to one or the other end of each of the metal patterns.

    [0012] US 2011/057887 A1 discloses a touch panel including a substrate, a plurality of first sensing series, and a plurality of second sensing series. The first sensing series and the second sensing series are disposed on the substrate. The first sensing series extend along a first direction and are electrically insulated from each other. Each of the first sensing series includes a plurality of first sensing pads and a plurality of first bridge portions connected between the first sensing pads. The second sensing series extend along a second direction and are electrically insulated from each other. Each of the second sensing series includes a plurality of second sensing pads and a plurality of second bridge portions connected between the second sensing pads. Each of the first bridge portions and one of the second bridge portions are intersected, and at least one of the second bridge portions has at least one electrostatic discharge tip.

    [0013] US 2012/007827 A1 discloses a touch sensing structure for a capacitive touch panel comprising a substrate, at least one first conductive line formed on the substrate, an insulating layer formed on the substrate and covering the first conductive line, the insulating layer having at least two adjacent holes therein formed above the two ends of the first conductive line respectively, at least two adjacent first conductive cells, at least two adjacent second conductive cells and at least one second conductive line formed on the insulating layer, the adjacent first conductive cells connected to two ends of the first conductive line correspondingly, the second conductive cells located on two sides of the first conductive line respectively, the second conductive line located on the insulating layer for interconnecting the adjacent second conductive cells, and the insulating layer makes the first conductive line electrically insulated from the second conductive line, thereby forming the touch sensing structure.

    SUMMARY



    [0014] Embodiments of the present invention provide a touch sensor and a touch screen for decreasing damage possibility of the touch screen.

    [0015] According to the present invention, there is provided a touch sensor as set forth in the appended independent claim 1.

    [0016] Another aspect of the present invention provides a touch screen comprising the above-mentioned touch sensor.

    [0017] Yet another aspect provides a display device comprising the above-mentioned touch screen. With the touch sensor provided by an embodiment of the present invention, because the vertical conducting area comprises at least one insulating zone, the overlapped portion of the vertical conducting area with the conductive bridge can be divided into separate zones; when one zone is damaged, other zone(s) can still work properly, and thus the use of this touch sensor can decrease damage possibility of a touch screen.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0018] In order to illustrate the technical solution of the embodiment of the present invention more clearly, a simply introduction about the drawings of the embodiments will be made in the following, and obviously, the drawings described later relate to only some examples of the disclosure and an embodiment of the present invention, rather than limit the scope of the present invention as defined by the appended claims.

    Fig.1 is a structural schematic top view of an existing touch sensor;

    Fig.2 is a schematic view of the sectional structure along the A'A direction of Fig.1;

    Fig.3 is a schematic view of the sectional structure along the B'B direction of Fig.1;

    Fig.4A is a structural schematic top view of the first touch sensor provided by the first example of the present disclosure;

    Fig.4B is a schematic view of the sectional structure along the D'D direction of the Fig.4A;

    Fig.4C is a structural schematic top view of the second touch sensor provided by the second example of the present disclosure;

    Fig.5 is a schematic view of the sectional structure along the D'D direction of Fig4C;

    Fig.6A is a structural schematic top view of the third touch sensor provided by the third example of the present disclosure;

    Fig.6B is a structural schematic top view of the fourth touch sensor provided by the fourth example of the present disclosure;

    Fig.7 is a structural schematic top view of the fifth touch sensor provided by the fifth example of the present disclosure; and

    Fig.8 is a structural schematic top view of the sixth touch sensor provided by an embodiment of the present invention.


    DETAILED DESCRIPTION



    [0019] To make clearer the object, technical solutions and advantages of the embodiments of the present invention, a clear and full description of the technical solution of the embodiment of the present invention will be made with reference to the accompanying drawings of the embodiment of the present invention.

    [0020] Unless otherwise defined, the technical or scientific terminologies used herein should have common meanings to be understood by the ordinary skilled in the relevant art of the present invention. Phrases such as "first", "second" as well as similar words used in the patent application specification and claims of the present invention do not mean any sequence, quantity or importance, but are only used to distinguish different components. Similarly, phrases such as "a", "an", "the" or the like do not mean quantitative restriction, but mean the existence of at least one object. Phrases such as "comprise", "include" or "contain" and similar words intend to mean that the elements or articles before the phrases encompass the elements or articles and the equivalent thereof listed after the phrases, and do not exclude other elements or articles. Phrases such as "connected to" or "coupled with" are not limited to physically or mechanically connection, but include electrically connection, no matter direct or indirect. Further, phrases such as "upper", "lower", "left", "right" etc are used only for describing a relative positional relationship, which will be varied correspondingly when the described objects are changed in absolute positions.

    [0021] With the touch sensor provided by an embodiment of the present invention, because a vertical conducting area comprises at least one insulating zone, the overlapped portion of the vertical conducting area with a conductive bridge can be divided into separate zones; when one zone is damaged, other zone(s) can still work normally, and thus the use of this touch sensor can decrease damage possibility of a touch screen. Specific embodiments are introduced in the following.

    Example 1



    [0022] As shown in Fig.4A, the first example provides a first touch sensor, and Fig.4B is a sectional view along the D'D direction of Fig.4A. The touch sensor comprises a conductive bridge 11 formed extending transversely on a substrate, an insulating layer 21 formed on the conductive bridge 11, a horizontal conducting area 14 and a vertical conducting area 41 formed to be spaced from each other on the insulating layer 21. Two horizontal conducting areas 14 on both sides of the vertical conducting area 41 are conducted with the conductive bridge 11 extending transversely via through holes 12 in the insulating layer 21.

    [0023] The substrate may be a glass or plastic substrate, such as the substrate on the display side of a liquid crystal display device (e.g., a color filter substrate), or an individual glass or plastic substrate, which can be attached to the display device. As shown in Fig.4A, as a whole, the horizontal conducting area 14 extends in the horizontal direction (transversal direction) on the substrate, the vertical conducting area 41 extends in the vertical direction (longitudinal direction) on the substrate and vertically overlaps with the conductive bridge 11 but is spaced from the conductive bridge 11 with the insulating layer 21; through holes 12 are formed at the ends of each conductive bridge 11 from the above.

    [0024] The above-mentioned conductive bridge 11, horizontal conducting area 14 and vertical conducting area 41 may be formed of, for example, a metal material or a transparent conductor material; the metal material is, for example, aluminum, aluminum alloy or the like, and the transparent conductor material is, for example, indium tin oxide (ITO), indium zinc oxide (IZO), or the like.

    [0025] The touch sensor may be prepared through the following manufacturing process.

    Step one, forming a layer of metal on a substrate for example and then etching the same to form a conductive bridge 11;

    Step two, forming a passivation layer (e.g., a PVX layer) on the conductive bridge 11, and then etching the same to form an insulating layer 21 with through holes 12 therein; the positions of the through holes 12 are, as shown in Fig.4A, located at the ends of the conductive bridge 11 from the above;

    Step three, forming a transparent conducting layer (e.g., ITO) on the insulating layer 21, and then etching the same to form a horizontal conducting area 14, a vertical conducting area 41 as well as one insulating zone 42 in the vertical conducting area 41.



    [0026] The vertical conducting layer 41 comprises one insulating zone 42 provided at a first designated position. The insulating zone 42 is for example an opening zone formed by removing part of the vertical conducting area 41. The insulating zone 42 forms a projection zone on the conductive bridge 11 by normal projection (vertical to the plain where the substrate is provided, that is, the paper plain of Fig.4A). The projection zone is identical with the insulating zone in its shape and size, the distance between two end points of the projection zone in the width direction of the conductive bridge 11 is not less than the width of the conductive bridge, and the two corresponding end points, that is, the points C and C' in Fig.4A, have a distance therebetween not less than the width of the conductive bridge 11.

    [0027] In this example, the insulating zone 42 is in a strip shape, and the first designated position refers to the position where the insulating zone 42 is perpendicular to the conductive bridge 11.

    [0028] After forming of the above touch sensor, a passivation layer may be further formed thereon for the purpose of flatness, and the passivation layer may be filled into the insulating zone 42 of the vertical conducting area 41.

    Example 2



    [0029] The second example provides a second touch sensor, which differs from the touch sensor of the first example in that: as shown in Fig.4C, there are two insulating zones 42 identical to each other in shape and size in the vertical conducting area 41; and both the insulating zones 42 are parallel to each other and spaced apart by a predetermined distance, and their center points are on a same horizontal line.

    [0030] Here the first designated position means the positions where both insulating zones 42 are perpendicular to the conductive bridge 11 respectively and at a same horizontal position; Fig.5 is a sectional view along the D'D direction of Fig.4C.

    [0031] In another implementation, the vertical conducting area 41 may comprise more than two insulating zones 42, these insulating zones 42 are parallel to each other and spaced apart by a predetermined distance, and their center points are on a same horizontal line.

    Example 3



    [0032] As shown in Fig.6A, the third example provides a third touch sensor with the following difference from the touch sensor of the second example.

    [0033] The center points of two or more than two insulating zones 42 of the vertical conducting layer are not on a same horizontal line; and as a matter of convenience, the positions where the two insulating zones are provided, as shown in Fig.6A, are described.

    [0034] In another implementation, the vertical conducting area 41 may comprise more than two insulating zones 42, these insulating zones 42 are parallel to each other and spaced apart by a predetermined distance, and their center points are not on a same horizontal line.

    Example 4



    [0035] As shown in Fig.6B, the fourth example provides a fourth touch sensor with the following difference from the touch sensor of the second example.

    [0036] Two or more insulating zones 42 of the vertical conducting area 41 are not the same in their shapes and sizes, and their center points may or may not be on a same horizontal line. Furthermore, the shape for the insulating zone 42 is not limited to the trapezoid shape as shown in Fig.6B, but may also be in other irregular shapes.

    Example 5



    [0037] As shown in Fig.7, the fifth example provides a fifth touch sensor with the following difference from the touch sensors of the above examples.

    [0038] The portions P of the edges of the conductive bridge at the positions of the edges of the insulating zone 42 corresponding to the edges of the conductive bridge 11 in the vertical direction are shaped to be irregular; for example, the irregular shape may be a saw shape.

    Embodiment of the present invention



    [0039] As shown in Fig.8, according to the present invention, a touch sensor is provided with the following difference from the touch sensors of the fifth example.

    [0040] The edge of the conductive bridge 11 is entirely provided in an irregular shape; and the irregular shape is a saw shape.

    [0041] The touch sensors of examples 2 to 5 and the touch sensor according to the present invention may be produced in a method similar to that described in example 1.

    [0042] The structure of the vertical conducting layer in example 1, 2, 3 or 4 may be combined with the conductive bridge 11 of example 5 or the conductive bridge 11 of the touch sensor according to the present invention in any suitable way so as to form a touch sensor.

    [0043] Preferably, when the touch sensor according to the present invention is used, it is possible to simplify the manufacturing technology for preparing the conductive bridge 11 compared with example 5.

    [0044] The materials for forming the structures and functional layers of the above examples and the embodiment of the present invention are not limited to the materials described above, and other suitable materials having similar properties are also applicable.

    [0045] The touch sensor proposed in the above example 5 and the touch sensor according to the present invention can further avoid excess accumulation of charges at slope angles. In particular, the insulating zones 42 are located between two horizontal conducting areas 14 and do not contact with the horizontal conducting layers 14.

    [0046] When the vertical conducting area 41 comprises a plurality of insulating zones 42 therein, the following conditions should be satisfied.

    First, the first designated position should ensure that all the insulating zones 42 are not intersected with each other.

    Second, every two insulating zones 42 are spaced apart by a first preset distance; the first preset distance can be determined according to actual requirements.

    Third, the insulating zones are spaced apart from the adjacent horizontal conducting layers by a second preset distance; the second preset distance can be determined according to actual requirements.



    [0047] Preferably, when the vertical conducting layer 41 comprises insulating zones 42 therein, if the conducting region between two adjacent insulating zones is damaged, the conducting region(s) in another portion(s) in the vertical conducting layer can still work properly so as to transmit signals, thus ensuring that the touch sensor can work normally.

    [0048] Another aspect of the present disclosure provides a touch screen comprising any of the above touch sensors. For example, the touch screen comprises a display panel, the touch sensor can be directly formed on the front surface of the display panel, or the touch sensor can be formed as an individual layer-like component and then attached onto the front surface of the display panel.

    [0049] Yet another aspect of the present disclosure provides a display device comprising the above touch screen.

    [0050] With the touch sensor provided by the embodiment of the present invention, because the vertical conducting area 41 comprises at least one insulating zone 42, the overlapped portion of the vertical conducting area 41 with the conductive bridge 11 may be divided into separate zones, when one zone is damaged, other zone(s) can still work properly, and thus the use of this touch sensor can decrease damage possibility of a touch screen.

    [0051] Preferably, when the touch sensor according to the present invention is used, it is possible to simplify the manufacturing technology for preparing the conductive bridge 11 compared with example 5.

    [0052] Preferably, the touch sensor proposed in example 5 and the touch sensor according to the present invention can further avoid damages caused by excessive accumulation of charges at the slope angles in the vertical conducting area.

    [0053] The protective scope of the present invention is determined by the appended claims.


    Claims

    1. A touch sensor, comprising: a substrate, two first conducting areas (14) which extend in a first direction on the substrate, a conductive bridge (11) having two ends, each of the two ends connected with a respective one of the two first conducting areas (14), and a second conducting area (41) which extends in a second direction perpendicular to the first direction on the substrate, the conductive bridge (11) overlapping with the second conducting area (41) and spaced with the second conducting area (41) by an insulating layer (21); wherein the second conducting area (41) comprises at least one insulating zone (42), and the insulating layer (21) and the insulating zone (42) are formed in different layers;
    wherein the conductive bridge (11) extends in the first direction and has a width in a width direction of the conductive bridge (11), the width direction of the conductive bridge (11) being perpendicular to the first direction; and
    wherein a distance in the width direction of the conductive bridge (11) between two corresponding end points of a projection zone formed by normal projection of the at least one insulating zone (42) on the conductive bridge (11) is not less than the width of the conductive bridge (11);
    characterized in that the two first conducting areas (14), the second conducting area (41) and the insulating zone (42) are formed in a same layer on the insulating layer (21), and edges of the conductive bridge extending in the first direction are entirely provided in a saw shape.
     
    2. The touch sensor according to claim 1, wherein the at least one insulating zone (42) of the second conducting area (41) comprises at least two insulating zones (42), and every two insulating zones (42) of the at least two insulting zones (42) are spaced by a first preset distance therebetween.
     
    3. The touch sensor according to claim 1 or 2, wherein the at least one insulating zone (42) and the first conducting area (14) adjacent thereto are spaced by a second preset distance.
     
    4. The touch sensor according to claim 2, wherein shapes of all of the at least two insulating zones (42) are the same to each other.
     
    5. The touch sensor according to any one of claims 1-4, wherein the at least one insulating zone (42) is in a rectangle shape.
     
    6. The touch sensor according to claim 5, wherein a long side of the at least one insulating zone (42) is perpendicular to the conductive bridge (11).
     
    7. The touch sensor according to claim 2, wherein shapes of all of the at least two insulating zones (42) are not the same to each other.
     
    8. A touch screen comprising the touch sensor according to any one of claims 1-7.
     
    9. A display device comprising the touch screen according to claim 8.
     


    Ansprüche

    1. Berührungssensor, umfassend: ein Substrat, zwei erste leitfähige Bereiche (14), die sich in einer ersten Richtung auf dem Substrat erstrecken, eine leitfähige Brücke (11), die zwei Enden aufweist, wobei jedes von den zwei Enden mit einem jeweiligen von den zwei ersten leitfähigen Bereichen (14) verbunden ist, und umfassend einen zweiten leitfähigen Bereich (41), der sich in einer zweiten Richtung senkrecht zu der ersten Richtung auf dem Substrat erstreckt, wobei die leitfähige Brücke (11) sich mit dem zweiten leitfähigen Bereich (41) überlappt und mittels einer isolierenden Schicht (21) mit dem zweiten leitfähigen Bereich (41) beabstandet ist; wobei der zweite leitfähige Bereich (41) zumindest eine isolierende Zone (42) umfasst und die isolierende Schicht (21) und die isolierende Zone (42) in verschiedenen Schichten gebildet sind;

    wobei die leitfähige Brücke (11) sich in der ersten Richtung erstreckt und eine Breite in einer Breitenrichtung der leitfähigen Brücke (11) hat, wobei die Breitenrichtung der leitfähigen Brücke (11) senkrecht zu der ersten Richtung ist; und

    wobei ein Abstand in der Breitenrichtung der leitfähigen Brücke (11) zwischen zwei korrespondierenden Endpunkten von einer Projektionszone, gebildet mittels normaler Projektion der zumindest einen isolierenden Zone (42) auf die leitfähige Brücke (11), nicht kleiner ist als die Breite der leitfähigen Brücke (11);

    dadurch gekennzeichnet, dass die zwei ersten leitfähigen Bereiche (14), der zweite leitfähige Bereich (41) und die isolierende Zone (42) in einer gleichen Schicht auf der isolierenden Schicht (21) gebildet sind und dass Ränder der leitfähigen Brücke, die sich in der ersten Richtung erstrecken, vollständig in einem Sägeprofil gebildet sind.


     
    2. Berührungssensor gemäß Anspruch 1, wobei die zumindest eine isolierende Zone (42) des zweiten leitfähigen Bereichs (41) zumindest zwei isolierende Zonen (42) umfasst, wobei jede der zwei isolierenden Zonen (42) der zumindest zwei isolierenden Zonen (42) mittels eines dazwischen vorgegebenen Abstands beabstandet sind.
     
    3. Berührungssensor gemäß Anspruch 1 oder 2, wobei die zumindest eine isolierende Zone (42) und der dazu benachbarte erste leitfähige Bereich (14) mittels einer zweiten vorgegebenen Distanz beabstandet sind.
     
    4. Berührungssensor gemäß Anspruch 2, wobei Formen von allen der zumindest zwei isolierenden Zonen (42) zueinander gleich sind.
     
    5. Berührungssensor gemäß einem der Ansprüche 1-4, wobei die zumindest eine isolierende Zone (42) eine Viereckform besitzt.
     
    6. Berührungssensor gemäß Anspruch 5, wobei eine Längsseite von der zumindest einen isolierenden Zone (42) senkrecht zu der leitfähigen Brücke (11) ist.
     
    7. Berührungssensor gemäß Anspruch 2, wobei Formen von allen der zumindest zwei isolierenden Zonen (42) nicht zueinander gleich sind.
     
    8. Berührungsbildschirm, umfassend den Berührungssensor gemäß einem der Ansprüche 1-7.
     
    9. Anzeigevorrichtung, umfassend den Berührungsbildschirm gemäß Anspruch 8.
     


    Revendications

    1. Un capteur tactile, comprenant : un substrat, deux premières zones conductrices (14) qui s'étendent dans une première direction sur le substrat, un pont conducteur (11) ayant deux extrémités, chacune des deux extrémités étant connectée à une zone respective des deux premières zones conductrices (14), et une deuxième zone conductrice (41) qui s'étend dans une deuxième direction perpendiculaire à la première direction sur le substrat, le pont conducteur (11) chevauchant la deuxième zone conductrice (41) et étant espacé de la deuxième zone conductrice (41) par une couche isolante (21) ; dans lequel la deuxième zone conductrice (41) comprend au moins une zone isolante (42), et la couche isolante (21) et la zone isolante (42) sont formées dans des couches différentes ;

    dans lequel le pont conducteur (11) s'étend dans la première direction et a une largeur dans une direction de la largeur du pont conducteur (11), la direction de la largeur du pont conducteur (11) étant perpendiculaire à la première direction ; et

    dans lequel une distance dans la direction de la largeur du pont conducteur (11) entre deux points d'extrémité correspondants d'une zone de projection formée par projection normale de l'au moins une zone isolante (42) sur le pont conducteur (11) n'est pas inférieure à la largeur du pont conducteur (11) ;

    caractérisé en ce que

    les deux premières zones conductrices (14), la deuxième zone conductrice (41) et la zone isolante (42) sont formées dans une même couche sur la couche isolante (21), et des bords du pont conducteur s'étendant dans la première direction sont entièrement prévus en forme de scie.


     
    2. Le capteur tactile selon la revendication 1, dans lequel l'au moins une zone isolante (42) de la deuxième zone conductrice (41) comprend au moins deux zones isolantes (42), et chaque deux zones isolantes (42) des au moins deux zones (42) sont espacées par une première distance prédéfinie entre elles.
     
    3. Le capteur tactile selon la revendication 1 ou 2, dans lequel l'au moins une zone isolante (42) et la première zone conductrice (14) qui lui est adjacente sont espacées par une deuxième distance prédéfinie.
     
    4. Le capteur tactile selon la revendication 2, dans lequel les formes de toutes les au moins deux zones isolantes (42) sont identiques entre elles.
     
    5. Le capteur tactile selon l'une quelconque des revendications 1 à 4, dans lequel l'au moins une zone isolante (42) est de forme rectangulaire.
     
    6. Le capteur tactile selon la revendication 5, dans lequel un côté long de l'au moins une zone isolante (42) est perpendiculaire au pont conducteur (11).
     
    7. Le capteur tactile selon la revendication 2, dans lequel les formes de toutes les au moins deux zones isolantes (42) ne sont pas identiques entre elles.
     
    8. Un écran tactile comprenant le capteur tactile selon l'une quelconque des revendications 1 à 7.
     
    9. Un dispositif d'affichage comprenant l'écran tactile selon la revendication 8.
     




    Drawing















    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description