JP2008186480A - Transparent touch panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transparent touch panel capable of improving durability to sliding motion repeated by an input pen or the like regarding a transparent touch panel surface and a transparent conductive film, and suppressing a lowering of yield in assembling and conveying during a manufacturing process. <P>SOLUTION: The transparent touch panel in which fixed side and movable side transparent substrates 1, 2 each formed with a transparent conductive film 3 on one side are arranged so that the transparent conductive films face each other through a spacer, has a self-curing coating layer 6 on the opposite side to a surface formed with the transparent conductive film 3 of the movable side transparent substrate. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a transparent touch panel which is installed on a display such as a liquid crystal or a cathode ray tube used for a PDA (Personal Digital Assistant), a personal computer, etc. and can input information with an input pen or the like.

  A transparent touch panel has a structure in which a transparent substrate on a fixed side and a movable side, each of which has a transparent conductive film formed on one side, is arranged so that the transparent conductive films face each other with a spacer interposed therebetween, and is insulated by the spacer. Both transparent conductive films are brought into contact with each other by pressing a part of the surface of the panel with an input pen or the like so as to be electrically connected so that input can be performed.

  The surface of the transparent touch panel may be worn and damaged by sliding with the tip of an input pen or the like when inputting information. Conventionally, a hard coat layer is provided on the transparent touch panel surface to protect the surface of the transparent touch panel. Things have been done.

  However, even when a hard coat layer is formed on the surface of the transparent touch panel, the hard coat layer may be peeled off by repeated sliding with an input pen or the like, and the transparent touch panel surface may not be protected at the peeled portion.

  In addition, the conventional transparent touch panel may cause cracks or peeling in the transparent conductive film due to repeated sliding with an input pen or the like, resulting in an input failure.

  Furthermore, in the conventional transparent touch panel, at the time of assembling or transporting during the manufacturing process, scratches or the like are generated in the members constituting the transparent touch panel, and the yield is reduced.

  Therefore, the object of the present invention is to solve the above-mentioned problems, improve the durability against sliding that is repeated by the input pen etc. on the transparent touch panel surface and the transparent conductive film, and also the yield at the time of assembly and transportation during the manufacturing process. It is providing the transparent touch panel which can suppress a fall.

  In order to achieve the object, the present invention provides a transparent touch panel in which a fixed-side transparent substrate having a transparent conductive film formed on one side and a movable-side transparent substrate are arranged so that the transparent conductive films face each other via a spacer. The movable-side transparent substrate has a self-healing coat layer on the side opposite to the surface on which the transparent conductive film is formed.

  Since the transparent touch panel of the present invention has the above configuration and operation, the following effects are exhibited.

  That is, the transparent touch panel of the present invention has a self-healing coat layer on the side opposite to the surface of the movable transparent substrate on which the transparent conductive film is formed. The self-healing coat layer is deformed when information is input, and is restored to its original shape as time passes. Therefore, even if sliding with an input pen is repeated, the surface of the transparent touch panel is protected and the transparent conductive film is formed. Cracks and peeling are unlikely to occur.

  Moreover, it becomes easy to prevent damages such as scratches during assembly and transportation in the manufacturing process, and the yield can be improved.

Hereinafter, the transparent touch panel of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view showing an embodiment of a transparent touch panel according to the present invention. In the figure, 1 is a transparent substrate on the movable side, 2 is a transparent substrate on the fixed side, 3 is a transparent conductive film, 4 is a spacer, 5 is a double-sided tape, and 6 is a self-healing coat layer.

  The movable transparent substrate 1 is not particularly limited as long as it is a flexible plate made of a highly transparent material. Further, the movable-side transparent substrate 1 may be composed of a single plate, or may be a laminate in which a plurality of plates are stacked. In addition, a film-like thing is also contained in the board as used in this specification. In addition, the surface of the movable transparent substrate 1 opposite to the surface on which the transparent conductive film 3 is formed may be subjected to a hard coat treatment, a satin treatment, a low reflection treatment, an antifouling treatment, or the like. A plurality of combined processes may be performed.

  The transparent substrate 2 on the fixed side is preferably a highly transparent material that does not deform due to external pressure. Examples include engineering plastics such as glass plates, polycarbonate resins, polyamide resins, and polyether ketone resins, and resin plates such as polyester resins, acrylic resins, polystyrene resins, cellulose resins, and polyolefin resins. . Further, the fixed-side transparent substrate 2 may be composed of a single plate, or may be a laminate in which a plurality of plates are stacked.

  The optical characteristics of the transparent substrates 1 and 2 are not limited to optical isotropy, and known ones such as a quarter-wave plate used for a low reflection touch panel can be used. The low reflection touch panel is a transparent touch panel for a liquid crystal display. Usually, in order from the liquid crystal display side, a first quarter wavelength plate, two layers of transparent conductive films facing each other via a spacer, and a second quarter wavelength. A plate and a polarizing plate are arranged at least. By forming a circularly polarized antireflection filter with the second quarter-wave plate and the polarizing plate, a transparent conductive film for light incident from the outside even when the input operation is performed in a room with a fluorescent lamp or the like or outdoors The reflection at 6 is efficiently cut. In this case, the second quarter-wave plate and the polarizing plate constitute all or part of the movable-side transparent substrate 1, and the first quarter-wave plate constitutes all or part of the fixed-side transparent substrate 2. Will be configured.

  The material of the transparent conductive film 3 includes metal oxides such as tin oxide, indium oxide, antimony oxide, zinc oxide, cadmium oxide, indium tin oxide (ITO), composite films mainly composed of these metal oxides, gold, There are silver, copper, tin, nickel, aluminum, palladium and the like. As a method for forming the transparent conductive film 3, a vacuum deposition method, a sputtering method, an ion plating method, a CVD method, or the like is used.

  The spacer 4 is formed on the surface of one of the transparent conductive films 3. The spacer 4 can be obtained by forming a transparent photocurable resin into fine dots by a photo process. Also, the spacer 4 can be formed by forming a large number of fine dots by a printing method.

  The transparent substrates 1 and 2 on the movable side and the fixed side are fixed by sticking the peripheral edges thereof with an adhesive or an adhesive. Examples of the pressure-sensitive adhesive or adhesive include double-sided tape 5, glue-like pressure-sensitive adhesive, acrylic-based, epoxy-based, urethane-based, silicone-based UV curable resin, and thermosetting resin.

  A feature of the present invention is that the transparent touch panel has a self-healing coat layer 6 on the side opposite to the surface on which the transparent conductive film of the transparent substrate on the movable side is formed (see FIG. 1). No. 6 has a structure such as a bridge or a network structure, and even if it is deformed, it is restored to its original shape with the passage of time. When inputting information to the transparent touch panel, the surface of the transparent touch panel is pressed with a finger or an input pen and slid. At this time, the self-healing coat layer 6 in the transparent touch panel is deformed, so that the surface friction force The stress inside the transparent substrate on the movable side, the contact pressure between the transparent conductive films in the transparent touch panel, and the like are reduced. Moreover, the shape before the deformation is restored with the passage of time. Therefore, durability against sliding that is repeated by the input pen or the like on the transparent touch panel surface and the transparent conductive film 3 can be improved. That is, the surface of the transparent touch panel is protected, and cracks and peeling are less likely to occur in the transparent conductive film. Further, it is possible to suppress a decrease in yield at the time of assembly or transportation during the manufacturing process. In this specification, in order to explain the function of restoring with the passage of time in an easy-to-understand manner with a short word, this expression that is similar to the “self-healing” of the living body is used.

  The self-healing coat layer 6 is made of a transparent resin such as acrylic, urethane, polycarbonate, polystyrene, polyester, silicon, fluorine, or a copolymer or blend thereof, and is relatively soft and elastic. Use one that is easy to deform. Specific examples include a two-pack type special acrylic resin paint “self-healing clear” (manufactured by NATCO).

  In the case where the self-healing coat layer 6 is provided on the side opposite to the surface on which the transparent conductive film 3 of the movable transparent substrate 1 is formed, on the self-healing coat layer 6, a hard coat treatment, a satin finish, A reflection process, an antifouling process, etc. may be performed, and the process which combined these two or more may be performed. Further, the self-healing coat layer 6 may be provided after performing either or both of the hard coat treatment and the satin finish treatment. Further, the self-healing coat layer 6 itself may have characteristics such as satin finish, low reflectivity and antifouling property.

It is sectional drawing which shows one Example of the transparent touchscreen which concerns on this invention.

Explanation of symbols

1 Movable transparent substrate,
2 Transparent substrate on the fixed side,
3 transparent conductive film,
4 spacer,
5 Double-sided tape,
6 Self-healing coat layer

Claims (1)

A transparent touch panel in which a transparent conductive film on one side with a transparent conductive film formed on each side is placed so that the transparent conductive films face each other via a spacer is formed. A transparent touch panel having a self-healing coat layer on the side opposite to the coated surface.

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