JP2005326924A - Touch panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a touch panel having light shielding structure in which the periphery part is equipped with a function for shielding the rays of light, also the internal elements and defective points are shielded and the beauty as a product therefore can be secured. <P>SOLUTION: The touch panel 1 having the light shielding structure is provided with: a first panel 11 which has a first opposed face 112 and is deformed when touched; a second panel 15 which has a second opposed face 151 disposed so as to be opposite to the first opposed face 112; and light shielding structure 163 which is positioned between the periphery part of the first panel 11 and the periphery part of the second panel 15 and is equipped with a first connection face 1631 in contact with the first opposed face 112 and a second connection face 1632 in contact with the second opposed face 151, the width of the first connection face 1631 being smaller than the width of the second connection face 1632. Thus, the touch panel has the effects of light shielding and prolongation of its service life. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a touch panel having a light-shielding property, and more particularly to a touch panel that forms a light-shielding structure using insulating glue having different widths on two sides.

  The touch panel is a humanized input device, and is composed of a transparent panel and a soft tail arranged in opposite directions. Among them, a conductive transparent film is provided on the corresponding surfaces of both transparent panels. In general, the peripheral portions of the two transparent panels are usually joined by insulating glue. Since the touch panel also functions as input devices such as a keyboard, a mouse, a track ball and a track point, the input efficiency and convenience can be clearly improved. All of the current electronic product designs have light, thin, short, small and strong functions as aspects, and traditional keyboards can no longer meet demand. The touch panel's ability to match the input and output to the same interface is even more inferior to other traditional input devices, and the touch panel is already operating at the human interface when industrial designers develop related displays. For example, personal digital assistants (PDAs) that are very popular now and various types of products, e-book, Mobile phone Handheld PC, GPS, etc. Is selected as the input device.

  FIG. 1 is a front view of a display having a touch panel. As shown in FIG. 1, the identification range is divided into an outer dimension OD, a visible area VA, and an active area AA. The outer dimension OD indicates the outer dimension of the product, and the visible area VA is an actual dimension of the touch panel. The active area AA refers to an area where a touch is actually made on the touch panel to generate a reaction.

  FIG. 2 is an assembly diagram of the display device of the fluoroscopic panel. As shown in FIG. 2, when an assembly work is traditionally performed, the edge of the display outer frame (Bezel) 3 is usually designed between the visible area VA and the active area AA. Under the principle of not increasing the cost and maintaining the original touch panel dimensions, it is already a trendy mainstream to design the outer frame 3 to be thinner and the screen to be enlarged according to the individualization of the product. It has become. Since the opening of the outer frame 3 is too large, there is a possibility that a spectrum space scattered by reflection appears on the inner edge, or a situation where the element is exposed may appear, and the value of the product is reduced anyway. .

  3 and 4 are views showing the relative positions of the first panel and the insulating glue when the touch panel is activated. As shown in FIGS. 3 and 4, when the user performs an input operation using the silica gel pen 4, the silica gel pen 4 applies pressure to the first panel 11. In response to the deformation, it touches the second panel 15 to generate a touch reaction. If the silica gel pen 4 does not apply pressure to the first panel 11, the first panel 11 recovers to an undeformed state before receiving pressure according to its own elasticity. However, as the usage time increases, the peripheral edge portion of the first panel 11 is pressed against the insulating glue 16 for a long time, and the crack 113 is generated. More seriously, the first panel 11 is broken, and the touch panel 1 is thereby short-circuited and loses its function.

  At the same time, the conventional structure causes not only cracking problems but also light leakage problems. As shown in FIG. 5, if the cover range of the outer frame 3 is too small, the light beam 211 emitted by the reflection of the light guide plate 21 cannot be shielded by the outer frame 3, so that a light leakage phenomenon appears.

  Therefore, there is a demand for a design that can solve the light leakage problem and has an aesthetic appearance and an extended service life under the premise that the cost of the touch panel manufacturing process is not increased.

  As a result of careful examination and repeated research, the present applicant finally devised the “touch panel shading structure” of the present invention.

  SUMMARY OF THE INVENTION The main object of the present invention is to provide a touch panel having a light-shielding structure, which has a light-shielding function at the peripheral edge and shields internal elements and defect points to combine the aesthetics of the product.

  Another object of the present invention is to use a wedge-shaped insulating glue as a touch panel having a light-shielding structure, thereby achieving light shielding and combining aesthetics and effectively extending the service life of the touch panel.

To achieve the above object, a touch panel having a light-shielding structure according to the present invention has a first opposing surface, a first panel that deforms in response to a touch, and a second opposing surface. A second panel in which the second facing surface and the first facing surface are disposed to face each other, and between a peripheral edge portion of the first panel and a peripheral edge portion of the second panel And a first connection surface that is in contact with the first opposing surface and a second connection surface that is in contact with the second opposing surface, and the width of the first connection surface is the second connection surface. The light-shielding structure is smaller than the width of the connection surface. (Corresponding to claim 1)
In the touch panel having the light shielding structure of the present invention, the first panel further includes a touch surface that receives the touch. (Corresponding to claim 2)
In the touch panel having the light-shielding structure of the present invention, both the first panel and the second panel are made of a transparent insulating base material.
The light shielding structure is a black light absorber. (Corresponding to claim 3)
In the touch panel of the present invention, the transparent insulating substrate is glass or plastic.

In the touch panel having the light shielding structure of the present invention,
A transparent first conductive layer is formed on the surface of the first facing surface, and a transparent second conductive layer is formed on the surface of the second facing surface. (Corresponding to claim 4)
In order to achieve the above object, a touch panel having a light-shielding structure according to another invention provided by the present invention includes a first panel having a first facing surface and deformed in response to the touch, and a second panel. A second panel in which the second facing surface and the first facing surface are disposed to face each other, a peripheral edge portion of the first panel, and the second panel The first insulating layer is located between the peripheral portion and is composed of a plurality of laminated insulating layers, and the width of the first insulating layer adjacent to the first panel is the first adjacent to the second panel. A light shielding structure smaller than the width of the insulating layer;
It is characterized by comprising. (Corresponding to claim 5)
In the touch panel of the present invention, the first insulating layer and the first facing surface are in contact with each other, and the second insulating layer and the second facing surface are in contact with each other. (Corresponding to claim 6)
In the touch panel of the present invention, both the first panel and the second panel are composed of a transparent insulating base material.

In the touch panel of the present invention, the surfaces of the first facing surface and the second facing surface cover the transparent first conductive layer and second conductive layer, respectively. (Corresponding to claim 7)
In the touch panel of the present invention, the light shielding structure is a black light absorber.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 6 is a sketch of a touch panel having a light-shielding property according to a preferred embodiment of the present invention, and FIGS. 7 and 8 are diagrams illustrating a first operation when the touch panel according to the preferred embodiment of the present invention is activated. It is a relative position figure of a panel and insulating glue. As shown in these figures, the touch panel is composed of a first panel 11, a second panel 15, and a black insulating glue 163 connected to the first panel 11 and the second panel 15. Yes. Among them, the first panel 11 further includes a touch surface 111 and a first facing surface 112, the touch surface 111 serves to give and receive touches, and the first facing surface 112 has a conductive layer on the surface. 1121 is formed.

  The second panel 15 also has a second facing surface 151 and a second conductive layer 1511 formed on the surface. Insulating dot spacers 14 are sandwiched between the first panel 11 and the second panel 15 to improve the accuracy (accuracy) when the touch panel 1 causes a touch reaction. I can do it.

  According to the technique disclosed in the present embodiment, the black insulating glue 163 is replaced with a conventional insulating glue as a light shielding structure. This design shields the scattering due to the reflection of the light guide plate 21 and avoids the occurrence of light leakage phenomenon, and also shields the elements of the display module 2 and has an aesthetic feeling. In addition, this design maintains the original thickness of the insulating film (see 16 in FIG. 3), so there is no need to make separate adjustments with equipment and facilities when assembling the touch panel. Can achieve the goal of shading.

  Also, as shown in FIGS. 7 and 8, the width of the first connecting surface 1631 of the black insulating glue 163 is narrower than the width of the second connecting surface 1632, so when the silica gel pen 4 presses the pressure on the panel. In the first panel 11 of the touch panel 1, the crack 113 (see FIG. 4) does not appear due to the pressing with the black insulating glue 163 for a long time. Therefore, this design can effectively extend the life of the touch panel 1.

  9 and 10 are schematic views of relative positions between the first panel and the insulating glue when the touch panel is operated according to another preferred embodiment of the present invention. The difference from FIGS. 7 and 8 is that a black wedge-shaped black insulating layer 164 replaces the original black wedge-shaped insulating layer 163 (FIG. 7). Among them, the width of the first insulating layer 1641 is changed. Is narrower than the width of the second insulating layer 1642, so that it is possible to effectively avoid the occurrence of the tearing phenomenon due to the long time pressing of the touch panel 1 with the black insulating glue 164 when actually operating.

  Of course, those skilled in the art can simply change the design so that, for example, the black insulating glue 164 is composed of a plurality of small portions. In other words, it is only necessary that the horizontal length of the insulating layer adjacent to the second panel is larger than the horizontal length of the insulating layer adjacent to the first panel.

  In short, the light shielding structure of the touch panel provided by the present invention can avoid the occurrence of light leakage phenomenon and can also have the aesthetics of the product. Also, the traditional insulation width design has been replaced by designing the upper and lower unequal width insulation glue, so that after the touch panel has been used for a long time, the peripheral edge easily cracks and functions Can eliminate the shortcomings.

  The above-described embodiments are provided for better understanding of the technical means of the present invention. Naturally, the technical idea of the present invention should not be limited to this, and by those skilled in the art without departing from the scope of the appended claims. Any simple design changes, additions, modifications, etc. belong to the technical scope of the present invention.

The front view of the indicator provided with the conventional touch panel. The assembly drawing of the indicator provided with the conventional touch panel. The relative position figure of the 1st panel and insulation glue at the time of operation of the conventional touch panel. The relative position figure of the 1st panel and insulation glue which deformed under pressure at the time of operation of the conventional touch panel. It is a light leakage sketch of the conventional touch panel. FIG. 3 is a relative position diagram between the first panel and the insulating glue when the touch panel is operated according to a preferred embodiment of the present invention; The relative position figure of a 1st panel and insulation glue when the touch panel of preferred embodiment concerning this invention act | operates. The relative position figure of the 1st panel and the insulating glue which deform | transformed under pressure when the touch panel of preferred embodiment concerning this invention act | operates. FIG. 6 is a schematic diagram of a relative position between the first panel and the insulating glue when the touch panel is operated according to another preferred embodiment of the present invention. FIG. 6 is a schematic view of the relative position between the first panel and the insulating glue deformed under the pressure when the touch panel is operated according to another preferred embodiment of the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Touch panel, 11 ... 1st panel, 111 ... Touch surface, 112 ... 1st opposing surface, 1121 ... 1st conductive layer, 113 ... Crack, 14 ... Dot spacer, 15 ... 2nd panel , 151 ... second facing surface, 1511 ... second conductive layer, 16 ... insulating glue, 161 ... insulating glue first connecting face, 162 ... insulating glue second connecting face, 163, 164 ... black insulating glue, 1631 ... Black insulation glue first connection surface, 1632 ... Black insulation glue second connection surface, 1641 ... First insulation layer, 1642 ... Second insulation layer, 2 ... Display module, 21 ... Light guide plate, 211 ... Reflected light, 3 ... Outer frame, 4 ... Silica gel pen, AA ... Active area, VA ... Visible area, OD ... External dimensions.

Claims (7)

A touch panel having a light shielding structure,
A first panel having a first facing surface and deformed in response to a touch;
A second panel having a second facing surface, wherein the second facing surface and the first facing surface are disposed facing each other;
The first connecting surface and the second opposing surface that are located between the peripheral portion of the first panel and the peripheral portion of the second panel and that are in contact with the first opposing surface and in contact with the first opposing surface. A light shielding structure comprising a second connection surface, wherein the width of the first connection surface is smaller than the width of the second connection surface;
A touch panel characterized by comprising:   The touch panel according to claim 1, wherein the first panel further comprises a touch surface that receives the touch. The first panel and the second panel are both made of a transparent insulating base material, and the light shielding structure is a black light absorber.
The touch panel according to claim 1. A transparent first conductive layer is formed on the surface of the first facing surface, and a transparent second conductive layer is formed on the surface of the second facing surface.
The touch panel according to claim 1. A touch panel having a light shielding structure,
A first panel having a first facing surface and deformed in response to a touch;
A second panel having a second facing surface, wherein the second facing surface and the first facing surface are disposed facing each other;
The first panel is located between the peripheral edge of the first panel and the peripheral edge of the second panel, and is composed of a plurality of laminated insulating layers, of which the first adjacent to the first panel A light shielding structure in which the width of the insulating layer is smaller than the width of the second insulating layer adjacent to the second panel;
A touch panel characterized by comprising:   6. The first insulating layer and the first facing surface are in contact with each other, and the second insulating layer and the second facing surface are in contact with each other. Touch panel.   6. The touch panel according to claim 5, wherein each of the first panel and the second panel is composed of a transparent substrate.

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