• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The glass (1) with capacitive keys for a portable electronic instrument according to the invention comprises a base substrate (2) and at least one insulating film (11), which is provided with electrodes (13) capacitive keys. The insulating film is fixed on an outer surface of the base substrate (2), and a connection device (4, 5) is made in the base substrate. The connection device, which comprises conducting rods (4) in holes (5), electrically connects the electrodes of the insulating film to a processing circuit in the portable electronic instrument equipped with the glass (1). A decorative film (16) can be further fixed by means of an adhesive film (14) to the insulating film. The invention also relates to a method for manufacturing such a glass. The portable electronic instrument can be a watch.
    公开号:CH710005A2
    申请号:CH01250/14
    申请日:2014-08-20
    公开日:2016-02-29
    发明作者:Alain Hamm；Giovanni Longa
    申请人:Em Microelectronic Marin Sa；
    IPC主号:
    专利说明:

    The invention relates to a capacitive touch glass for a portable electronic instrument, especially for a watch.
    The invention also relates to a method of manufacturing a glass provided with capacitive keys for a portable electronic instrument. The glass comprises in particular an insulating film on which electrodes and at least conductive tracks connecting respectively each electrode to a connection portion are made.
    It is necessary to understand as an electronic instrument, any portable device, such as a wristwatch, a mobile phone, a badge or other device, which may be provided with a screen or display dial information above which is placed a glass, which closes the case of the instrument.
    The realization of a glass provided with one or more transparent electrodes as capacitive keys for equipping an electronic instrument is well known in particular in the field of watchmaking or mobile phones. Usually, several transparent electrodes, which constitute capacitive keys, are disposed on an inner face of the glass of the electronic instrument, such as a wristwatch. These capacitive keys are connected to an electronic processing circuit for controlling or controlling the functions of the electronic instrument.
    The realization of such transparent electrodes on the inner face of the glass is performed by a deposit of a conductive oxide layer, which may conventionally be a tin oxide and indium (ITO), and by etching of this conductive oxide layer. The thickness of the layer obtained is generally between 25 and 75 nm, and preferably between 45 and 55 nm. Each transparent electrode is connected by a conductive track to a connection portion at the edge of the glass of the electronic instrument to be connected, via a connector, to the electronic processing circuit in the electronic instrument.
    The glass, which may be plastic for an electronic instrument, such as a wristwatch, must have a sufficient thickness to withstand strong external pressures, for example when the watch is immersed. If the glass, which carries transparent electrodes on its inner face, must have a sufficient thickness, this large thickness of the glass can adversely affect the proper operation of the keyboard capacitive keys, which is a drawback.
    In the case of a time-display clock numerically, capacitive keys can be made in the liquid crystal display device. However, since the case of such a watch is closed by an additional lens to the liquid crystal display device, a relatively high distance remains between the finger of a user placed on the outer face of the glass and an electrode of a touch. capacitive to activate. This is also a disadvantage.
    Patent application EP 2 273 349 A2 describes a method for manufacturing a transparent element, such as a glass, which comprises capacitive keys for a portable electronic instrument. An insulating film, which carries capacitive key electrodes connected by conductive tracks, is arranged in a mold. A liquid substance is inserted in the mold, in order to be solidified and to coat at least a portion of the insulating film having the electrodes of the capacitive keys. At the outlet of the mold, a glass is thus obtained with capacitive keys integrated in the solidified material of the glass. However, it must be provided to properly position the insulating film in the mold to obtain a good integration of the capacitive keys in the solidified substance of the glass. In addition, only a few substances can be used to make this glass with integrated capacitive keys, which is a drawback.
    The invention therefore aims to overcome the disadvantages of the state of the art by providing a capacitive touch glass for a portable electronic instrument, which is sufficiently resistant while ensuring a high sensitivity of the capacitive keys actions. activated in particular by a finger of a user.
    For this purpose, the invention relates to a capacitive touch glass for a portable electronic instrument, which comprises the features defined in the independent claim 1.
    Particular embodiments of capacitive touch glass are defined in the dependent claims 2 to 15.
    An advantage of capacitive touch glass lies in the fact that the fixing of an insulating film electrode including transparent on an outer surface of a glass of a portable electronic instrument can be made very sensitive any action on the capacitive keys by a user's finger. The glass of the instrument can thus be of sufficient thickness to withstand any external force or pressure without impairing the operation of the capacitive keys. These capacitive keys are connected securely through the glass to an electronic processing circuit of the electronic instrument. To do this, metallized holes are made through the base substrate of the glass.
    For this purpose, the invention also relates to a method for manufacturing a capacitive touch glass for a portable electronic instrument, which comprises the characteristics defined in the independent claims 16 or 17.
    Particular steps of the manufacturing process are defined in the dependent claims 18 to 22.
    Advantageously, the insulating film carrying the electrodes capacitive keys is placed and fixed on an outer surface of the base substrate of the glass being guided by a peripheral edge of the base substrate. Another decoration insulating film can be further fixed to the capacitive-key insulating film by means of an adhesive film and following hot rolling of the films arranged one on the other. A connection device with holes in the base substrate and conductive rods or conductive deposits in the holes is made before or after at least for the conductive rods. The electrodes of the insulating film are electrically connected to the connection device.
    The purposes, advantages and characteristics of the capacitive touch glass for a portable electronic instrument, and its manufacturing method will appear better in the following description on the basis of non-limiting embodiments illustrated by the drawings in which:<tb> figs. 1a and 1b <SEP> represent a view from above and in section along A-A of FIG. 1a of an embodiment of the capacitive touch glass according to the invention,<tb> fig. 2 <SEP> represents an exploded three-dimensional view of a first embodiment of the capacitive-touch glass according to the invention, and<tb> fig. 3 <SEP> represents an exploded three-dimensional view of a second embodiment of the capacitive-touch glass according to the invention.
    In the following description, all the elements, which constitute the capacitive touch glass for a portable electronic instrument, which are well known to those skilled in this technical field, will be reported in a simplified manner. In the following description, reference is made primarily to a capacitive touch glass intended to equip a wristwatch as a portable electronic instrument. However, other portable electronic instruments may be equipped with the capacitive touch glass of the invention.
    In figs. 1a and 1b, there is shown a top view in diametral section of an embodiment of a capacitive touch glass obtained by the manufacturing method described below. The glass 1 may be rectangular in shape as shown in FIG. 1a, but also of circular shape or of another form to be mounted preferably above a dial in a wristwatch not shown. As shown in section in FIG. 1b, the general shape of the glass 1 may be curved, but it may be provided that this glass is also of generally flat shape not shown.
    The glass 1 comprises firstly a base substrate 2 and at least one insulating film or a set of films or layers 3 deposited or fixed on an outer surface of the base substrate 2. The film or films are flexible. The insulating film 3 carries one or more transparent or semi-transparent electrodes as capacitive keys as explained below with reference to FIG. 2.
    The base substrate 2 is designed relatively rigid and of sufficient thickness to withstand significant external forces or pressures, when the glass is mounted in the watch. This basic substrate 2 may preferably be transparent in its entirety or at least in a central portion so as to allow the viewing of the hourly indications of a dial of the watch. The base substrate 2 can also be tinted. The base substrate 2 may be made of plastic or mineral material.
    The base substrate 2 comprises on its upper or outer surface at least one peripheral edge 21, which is disposed continuously or by sectors at the periphery of the base substrate. The edge is dimensioned with respect to the dimensions of the insulating film or of all the films or layers 3 to facilitate mounting of the insulating film or each film or layer successively on the outer surface of the base substrate. This edge also serves to guide the placement of the insulating film or films to be fixed inside the peripheral edge 21.
    A small gap between the inner wall of the edge 21 and the periphery of each insulating film 3 may remain after mounting on the outer surface of the base substrate. This difference may be less than 1 mm, for example 0.1 mm for a watch glass with a width greater than 20 mm. In addition, the thickness of the edge 21 is substantially the same as the thickness of the set of films or layers 3 fixed on the outer surface of the base substrate 2 so as to form a uniformly thick glass.
    Two corners 22, 23 are also provided in particular at the periphery of the base substrate 2 to facilitate mounting of the glass in a watch case. These two corners are arranged laterally, for example on two opposite sides of the base substrate and preferably in the center of each corresponding side. It can be both sides of the glass parallel to each location of attachment of a bracelet to the watch case. The two corners 22, 23 may also be of different size, for example have a different length to act as a key during the assembly of the finished glass on the watch case.
    In the base substrate 2, there is further provided a connection device, which consists of conductive rods 4 arranged in a series of holes 5 made through the base substrate. The holes 5 with the rods or conductive deposits 4 are positioned facing an inner or lower surface of the insulating film mounted on the base substrate 2. Preferably the number of conductive rods 4 is equal to the number of electrodes of the capacitive keys provided on the insulating film. If 12 capacitive keys are provided, 12 holes 5 and 12 conductive rods 4 or conductive deposits in the holes are required. Preferably, the holes 5 and the conductive rods 4 are arranged on a line, which may be parallel and close to one side of the base substrate. The internal dimension of the holes corresponds to the external dimension of the conductive rods or the conductive deposits, which completely occupy the holes. The holes are of diameter for example less than 1 mm and are regularly spaced from each other. The conductive rods or the conductive deposits 4 project slightly on each side of the holes to facilitate the electrical connection of the rods or conductive deposits.
    The connection device thus makes it possible to electrically connect a connection portion of the insulating film, which comprises conductive pads connected by conductive tracks to the transparent electrodes of the capacitive keys. Preferably, the electrodes, the conductive tracks and the conductive pads are disposed on an inner or lower surface of the insulating film 3 to face the outer surface of the base substrate and facilitate the electrical connection to the connection device 4, 5.
    It should be noted that another type of connection device may be provided for electrically connecting the electrodes of the capacitive keys to an electronic processing circuit in the watch case. Vertical grooves on an edge of the base substrate 2 can be made and conductive deposits for example ITO can be made in the grooves. The grooves are of identical size and regularly spaced, and each conductive deposit can be electrically connected to the corresponding electrode of the finished capacitive touch glass. It can still be imagined that the insulating film with capacitive keys terminates in a tongue with connection pads, which are each connected to a corresponding electrode, in order to fold the tongue on an edge of the base substrate to come and connect an electrical connector in the watch box.
    FIG. 2 shows in detail a three-dimensional and exploded view of the different elements of the glass 1 with capacitive keys of a first embodiment. As can be seen, there is provided a set of films 3 or layers to be fixed on the outer surface of the base substrate 2. However in a simple case, it is clear that it can be provided that an insulating film 11 to bond by gluing or hot rolling on the outer surface of the base substrate 2. The insulating film 11 carries transparent electrodes 13 preferably on an inner surface of the film facing the outer surface of the base substrate 2. It can 12 transparent electrodes 13 are regularly spaced by a series of 3 electrodes on the inner surface of the insulating film 11. All the transparent electrodes of the capacitive keys may be of equivalent size in order to occupy the major part of the inner surface of the insulating film 11. Conductive tracks connect the transparent electrodes to connection pads of the insulating film to establish a connection to the connection device 4, 5. The conductive electrodes and connection pads, all of which are transparent, are made by chemical etching of a conductive oxide layer (ITO).
    According to FIG. 2, it can be provided above the insulating film 11 to have an OCA type adhesive film 14 and again above a decorative film 16. Each film or layer 11, 14, 16 may be of identical size to be easily guided by the peripheral edge 21 of the base substrate 2 during their assembly. The insulating film 11, the adhesive film 14 and the decorative insulating film 16 may be affixed to each other before mounting the film or film assembly 3 on the upper surface of the base substrate. However, preferably, as each film is of suitable size to be easily guided by the peripheral edge 21 during their assembly, each film is successively mounted from the upper surface of the base substrate 2. Once the films have been assembled, it can hot rolling is carried out to fix in particular the insulating film 11 to the decorative film 16 by means of the adhesive film 14. The insulating film may simply be glued to the upper surface of the base substrate 2 with the connection pads in direct contact with the conductive rods 4 or conductive deposits emerging from the holes 5 of the connection device.
    It should be noted that the connection device 4, 5 can be made in the base substrate 2 before mounting the or films 11, 14, 16 on the upper surface of the base substrate. However, the connection device can also be made after the mounting of the films 11, 14, 16 including the insertion of the conductive rods 4 in the holes 5 or the conductive deposits in the holes. These conductive deposits can be obtained by etching a layer of ITO or a metal paste or a conductive metal material, just like the conductive rods.
    FIG. 3 shows in detail a three-dimensional and exploded view of the different elements of the capacitive touch-glass 1 of a second embodiment. Unlike the first embodiment presented with reference to FIG. 2, there is provided here another adhesive film 18, which is arranged between the insulating film 11, which carries the capacitive keys 13, and the upper surface of the base substrate 2. This other adhesive film 18 comprises an arrangement of holes adapted to exactly on the conductive holes 4, 5 of the base substrate 2. Thus, after having arranged, for example, all the films on top of each other above the outer surface of the base substrate, it is possible to carry out a hot rolling of the set of films enabling the adhesive films to fix the set of films on the base substrate while being guided by the peripheral edge 21 of the base substrate 2.
    Of course as indicated with reference to FIG. 2, the holes 5 with the conductive rods 4 or the conductive deposits in the base substrate 2 can be made before or after the assembly of the film assembly. For example, the holes 5 in the base substrate can be made first, then the placement of each film 11, 14, 16, 18 successively on the base substrate, their fixing by hot rolling and finally insert the rods. conduct 4 in the holes 5 or perform a metal deposition or ITO in the holes 5.
    Once the glass 1 with capacitive keys is finished the first and second embodiments presented with reference to FIGS. 2 and 3, an electrical connection must still be made when mounting the glass in the watch case. To do this, it is generally provided a connector including Zebra type, which passes through the watch dial, to connect the connection terminals of a printed circuit board carrying a processing circuit, and to connect the conductive holes 4 opening into below the glass 1.
    From the description that has just been made, several variants of the capacitive touch glass for a portable electronic instrument, and its manufacturing process can be devised by those skilled in the art without departing from the scope of the invention. defined by the claims. It can be expected to place the transparent electrodes on an upper surface of the insulating film and provide metallized holes through the insulating film to connect the metallized holes of the base substrate. A plurality of capacitive touch insulating films may be provided and arranged fixed to one another while providing a connection to the metallized holes of the base substrate. It can be provided firstly to fix the insulating film on the outer surface of the base substrate, to introduce the conductive rods into the holes of the substrate for connection to the electrodes of the insulating film, and finally to fix the other films to the above the insulating film.
    权利要求:
    Claims (22)
    [1]
    1. Glass (1) with capacitive keys for a portable electronic instrument, the glass comprising a base substrate (2), and at least one insulating film (3, 11), which is provided with electrodes (13) of the capacitive keys characterized in that the insulating film is fixed on an outer surface of the base substrate (2), and a connection device (4, 5) is provided on or in the base substrate for electrically connecting the electrodes of the insulating film, and intended to be connected to a processing circuit in the portable electronic instrument, which is equipped with the glass (1).
    [2]
    Capacitive touch glass (1) according to claim 1, characterized in that the electrodes (13) are arranged on a first surface of the insulating film (3, 11), which is fixed on the outer surface of the base substrate ( 2).
    [3]
    Glass (1) with capacitive keys according to claim 1, characterized in that the insulating film (3, 11) is a flexible film with the electrodes (13) arranged solely on a first surface of the insulating film, which is fixed on the outer surface of the base substrate (2).
    [4]
    Capacitive touch glass (1) according to claim 1, characterized in that the insulating film (3, 11) is fixed on the outer surface of the base substrate (2) by means of a first adhesive film ( 18) following a hot rolling operation.
    [5]
    Glass (1) with capacitive keys according to claim 1, characterized in that the outer surface of the base substrate (2) comprises a peripheral edge (21), and in that the insulating film (3, 11) is fixed on the outer surface of the base substrate (2) within the peripheral edge (21).
    [6]
    Glass (1) with capacitive keys according to claim 5, characterized in that the dimension of the peripheral edge is adapted to the peripheral dimension of the insulating film (3, 11) to facilitate guiding and mounting of the insulating film on the surface. outer of the base substrate.
    [7]
    7. Glass (1) with capacitive keys according to claim 1, characterized in that the glass comprises a decorative film (16), which is fixed on the insulating film (11).
    [8]
    8. Glass (1) with capacitive keys according to claim 7, characterized in that the decorative film (16) is fixed on the insulating film by means of a second adhesive film (14) following a rolling operation. hot.
    [9]
    Capacitive touch glass (1) according to claim 1, characterized in that the glass comprises the insulating film (11) fixed on the outer surface of the base substrate (2) by means of a first adhesive film ( 18), and a decorative film (16) fixed to the insulating film (11) via a second adhesive film (14), and in that the assembly consisting of the first adhesive film (18), the insulating film (11), the second adhesive film and the decorative film are fixed on the outer surface of the base substrate following a hot rolling operation.
    [10]
    10. Capacitive touch glass (1) according to claim 9, characterized in that the dimension of each film is identical, and in that the outer surface of the base substrate comprises a peripheral edge (21) dimensioned according to the dimension peripheral of all the films to facilitate guiding and mounting the films on the outer surface of the base substrate.
    [11]
    11. Glass (1) with capacitive keys according to claim 10, characterized in that the thickness of the peripheral edge (21) corresponds to the thickness of all the films to form a uniform thickness of glass.
    [12]
    Glass (1) with capacitive keys according to claim 1, characterized in that the connecting device comprises conductive rods or conductive deposits (4) arranged in a series of holes (5) made through the base substrate or in a series of vertical grooves made on an edge of the base substrate (2).
    [13]
    13. Glass (1) with capacitive keys according to claim 12, characterized in that the number of holes (5) or grooves, and rods or conductive deposits (4) corresponds to the number of electrodes capacitive keys, and that the electrodes (13) on a first surface of the insulating film, are connected by respective conductive tracks to conductive pads of a connecting portion, the conductive pads being connected directly to the rods or conductive deposits.
    [14]
    14. Glass (1) with capacitive keys according to claim 13, characterized in that the holes (5) with the rods or conductive deposits (4) are arranged on a line and in a manner similar to the arrangement of the conductive pads of the connection portion of the insulating film for making an electrical connection.
    [15]
    15. Glass (1) with capacitive keys according to claim 14 characterized in that the holes (5) with the rods or conductive deposits (4) are of similar size and regularly spaced.
    [16]
    16. A method of manufacturing a glass (1) with capacitive keys for a portable electronic instrument according to one of the preceding claims, characterized in that it comprises the steps of:- making the connection device (4, 5) in the base substrate (2), and- fixing the insulating film (3, 11) on the outer surface of the base substrate, the insulating film comprising on a first surface, the electrodes (13), which are connected by respective conductive tracks to conductive pads of a portion connection, the connection portion being directly connected to the connection device.
    [17]
    17. A method of manufacturing a glass (1) with capacitive keys for a portable electronic instrument according to one of claims 1 to 15, characterized in that it comprises the steps of:- fixing the insulating film (3, 11) on the outer surface of the base substrate, the insulating film comprising on a first surface, the electrodes (13), which are connected by respective conductive tracks to conductive pads of a portion connection, and- Making the connection device (4, 5) in the base substrate (2), so that the connection device is directly connected to the connection portion.
    [18]
    18. A method of manufacturing a capacitive touch glass (1) according to one of claims 16 and 17, characterized in that the insulating film is fixed on the outer surface of the base substrate via a first adhesive film (18) and by hot rolling.
    [19]
    19. A method of manufacturing a capacitive touch glass (1) according to one of claims 16 to 18, characterized in that a decorative film (16) is fixed on the insulating film (3, 11) before or after making the connection device in the base substrate (2).
    [20]
    A method of manufacturing a capacitive touch glass (1) according to claim 19, characterized in that the decorative film (16) is fixed to the insulating film by means of a second adhesive film (14). and by means of hot rolling.
    [21]
    21. A method of manufacturing a glass (1) capacitive keys according to one of claims 16 and 17, wherein the base substrate (2) comprises a peripheral edge (21) of dimension similar to the insulating film, characterized in that the insulating film (3, 11) is arranged and guided by the peripheral edge to be fixed on the outer surface of the base substrate.
    [22]
    22. A method of manufacturing a capacitive touch glass (1) according to one of claims 16 and 17, characterized in that for the realization of the connection device, conductive rods or conductive deposits (4) are made in holes (5) of the base substrate (2).
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    同族专利:
    公开号 | 公开日
    CH710005B1|2021-02-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH01250/14A|CH710005B1|2014-08-20|2014-08-20|Capacitive touch glass for an electronic instrument, and method for its manufacture.|CH01250/14A| CH710005B1|2014-08-20|2014-08-20|Capacitive touch glass for an electronic instrument, and method for its manufacture.|
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