TWI498779B - Touch window - Google Patents

Description

Touch screen

The present invention claims priority to Korean Patent No. 10-2011-0080618 filed on Aug. 12, 2011. This is incorporated herein by reference.

The invention relates to a structure in which a touch screen forms a printed pattern.

A touch panel means that it is installed in an image display, such as a cathode ray tube (CRT), a liquid crystal display (LCD) device, and a field emission display (field). An emission display (FED) device, a plasma display panel (PDP), and an electro luminescence device (ELD), which enable a user to apply pressure thereto The touch panel is used to input a preset message in a computer while viewing the image display device.

1 and 2 are diagrams showing main components of a capacitive touch panel. 1 is a plan view showing a connecting structure having a multilayer structure; and FIG. 2 is a cross-sectional view taken along line X of FIG. Referring to the drawings, the touch panel generally has a stacked structure, including: an optically clear adhesives (OCA) 50, below a transparent window 10; an upper electrode layer (ITO) 40 at the upper portion. Below the optical glue 50; the lower optical glue 30 is under the upper electrode layer 40 The lower electrode layer 20 is below the lower optical glue 30; and a liquid crystal panel 60 is joined to the lower portion. A touch screen panel (TSP) formed by joining the different layers has a bonding area C; wherein the upper optical paste 50, the upper electrode layer 40, and the lower optical adhesive 30 are cut to A connection pad P is exposed to the bonding area C to be bonded to a flexible printed circuit board (FPCB) module.

In the touch panel, a printed pattern is implemented; the color is implemented according to the design of the terminal device, or a wire is wrapped therein. The printed pattern is printed as a structure that is printed directly on the lower surface of one of the transparent windows. However, the thickness of the printed pattern causes a problem that breaks the adhesion of the upper optical adhesive 50 to the lower portion of the transparent window 10, which causes defects and malfunctions.

An aspect of the present invention provides a touch screen having a printed pattern to improve adhesion on an adhesive insulating layer; wherein the printed pattern is printed on a portion disposed under one of the transparent windows One of the touch panels has a multi-layer structure and is formed as a stepped structure.

According to an aspect of the present invention, a touch screen includes: a transparent window; and a touch panel is provided with an adhesive material layer (adhesive material) a layer) bonded to a surface of the transparent window; and a printed pattern having a structure in which two or more printed patterns are stacked on the transparent window or the touch panel to form a stepped structure on the stacked patterns The end.

In addition, the printed pattern may be stacked in a structure in which the width of the printed pattern is gradually narrowed toward a topmost printed pattern, the topmost layer being the layer farthest from the bottommost printed pattern, The bottom layer is the layer closest to the transparent window or the touch panel.

In addition, the printed pattern may include: a first printed pattern which is a pattern closest to the transparent window or the base of the touch panel; and a second printed pattern having a width wider than the first printed pattern Or narrower.

Moreover, the printed pattern may include: the first printed pattern being the closest pattern to the base of the transparent window; the second printed pattern having a width smaller than the first printed pattern; and a third printed pattern A width is less than the second printed pattern.

Moreover, the printed pattern may be formed on the transparent window or formed on a contact surface between the touch panel and the adhesive material layer.

Moreover, the printed pattern may be disposed on one of the inactive areas of the touch panel, or may be disposed on the transparent window to correspond to an area of the non-action area.

Again, the stacked structure of the printed pattern is such that a surface roughness is formed over one or more of the stacked printed patterns.

In addition, the touch panel in the touch screen structure may include: a base substrate bonded to a surface of the transparent window by the adhesive material layer; and first and second sensing electrode patterns (sensing The electrode patterns are patterned on one surface of the base substrate and on the other surface opposite to the one surface.

In addition, the touch panel may include: a first sensing electrode pattern layer bonded to the transparent window by a first adhesive material layer, and having a sensing electrode formed on a surface thereof; A second sensing electrode pattern layer is bonded to the other surface of the first adhesive material layer by a second adhesive material layer, and has a sensing electrode formed on one surface thereof.

Moreover, the touch panel may include the first and second sensing electrode patterns directly formed on the transparent window and patterned to be insulated from each other.

Moreover, the touch panel may include: the base substrate, the adhesive material layer is bonded to a surface of the transparent window; and the first and second sensing electrode patterns are directly formed on one surface of the base substrate Upper and patterned to insulate each other.

According to the experimental embodiment of the present invention, the adhesion of the adhesive insulating layer can be improved by forming the printed pattern into a stepped structure; wherein the printed pattern is printed on the touch panel disposed under a portion of the transparent window One of them adheres to a part of the surface and has a multilayer structure.

Embodiments of the present invention will be described in detail below with reference to the drawings. In the description of the drawings, the same reference numerals will be given to the same elements in the drawings, and the repeated explanation will be omitted. It should be understood that the terms "first," "second," and the like are used herein to describe various elements; these elements are not limited to such terms. These terms are only used to distinguish the components.

3 and 4 are conceptual diagrams for forming a printed pattern P in a touch panel and a transparent window 100 to illustrate the present invention.

As shown in FIG. 3 and FIG. 4, a touch screen according to an experimental embodiment of the present invention may include: a transparent window 100; a touch panel bonded to a surface of the transparent window by an adhesive material layer 140; And a printed pattern P formed on the transparent window or the touch panel. That is, the touch screen may include: a transparent window 100 for receiving contact from one of the outside; and the touch panel disposed at a lower portion of the transparent window and performing a viewing with a sensing electrode pattern layer View area V/A and a dead area D/A.

In particular, referring to the foregoing structure of FIG. 3, the printed pattern printed on the transparent window 100 in FIG. 3a is implemented in a structure in which at least two or more layers are stacked. Generally, this can be set in a non-action area, thereby implementing a function of covering a wire pattern of one of the touch panels so that the appearance does not appear, and at the same time The design effect of Shiyi products. Further, the printed pattern, in this example, in order to implement the function of the printed pattern, can generally be formed in a structure in which the printed pattern is repeatedly printed as a plurality of layers. In the case where the printed pattern is implemented as a multilayer structure, that is, as shown in FIG. 3b, when the touch panel, the adhesive material layer 140, and the transparent window 100 are joined, bonded, because of the height or thickness of the printed pattern An air layer A is formed between the adhesive material layer and the printed pattern P, and this space causes an adhesive bond.

In order to avoid this phenomenon, in the present invention, the printed pattern P is formed in a stacked structure. In addition, as shown in FIG. 4, in the structure shown in FIG. 4a, in addition to the original multi-layer printed pattern, the printed pattern P may be stacked therein so that one end of the printed pattern can be successively successively Form a step structure. That is, the progressive step structure is obtained by forming a length of one of the printed patterns 101' adhered to one of the lower portions of the transparent window 100 to be larger than one of the printed patterns 102' stacked on one of the upper portions thereof. As shown in FIG. 4b, when the touch panel is bonded to the transparent window through the adhesive material layer, the stepped structure can minimize the air zones A1, A2. As such, the printed pattern can be implemented in a structure that is capable of improving the adhesion of the stacked structure that would result in an adhesive bond.

Further, in the present invention, in order to improve the adhesion between the multilayer printed pattern and the adhesive material layer, the printed pattern may be implemented in a structure in which the surface roughness is applied to one surface of the printed pattern. That is, when the printed pattern is piled When stacked into the multilayer structures 101 to 103, printed patterns stacked in a regular order are formed in the stepped structure. Alternatively, the surface roughness may be formed on the surface of each of the printed patterns or may be provided on the topmost layer 103 to improve the adhesion on the adhesive layer P.

As described above, the printed pattern in the touch screen according to the experimental embodiment of the present invention may be formed on the transparent window, as shown in FIGS. 3 and 4; or, although not shown, the touch pattern may be formed on the touch panel. Above the non-action zone.

Hereinafter, a structure in which a printed pattern structure according to another experimental embodiment of the present invention is applied to a touch panel will be briefly explained. In the above structure, the touch panel formed on the lower portion of the transparent window 100 may be formed in a structure as shown in FIG.

That is, the touch panel may be formed on a structure including: the base substrate 130, 110; and the sensing electrode patterns 132, 112 patterned on or adjacent to one surface of the base substrate On the surface. That is, the structure of the touch panel may include a first sensing electrode pattern layer bonded to the transparent window 100 with the first adhesive material layer 140 and having the sensing electrode pattern 132 formed on one surface thereof. And a second sensing electrode pattern layer bonded to the other surface of the first sensing electrode pattern layer by a second adhesive material layer, and having the sensing electrode pattern 112 formed on the first surface On the surface. In particular, in this example, each of the first sensing electrode pattern 132 and the second sensing electrode pattern 112 can be implemented as a structure; wherein they are respectively formed on different base substrates 130, 110, separated from each other And set. Further, the conductor patterns 131, 111 connected to the sensing electrode patterns 132, 112 can be formed. Further, the printed pattern P having the foregoing multilayer structure may be implemented on one surface of the transparent window 100 corresponding to an area in which the wiring pattern is formed. In particular, in this example, as described above, the printed pattern P has a stepped structure to enhance the adhesion.

In this example, the adhesive material layer may be an OCA film, and in the structure of the first and second sensing electrode pattern layers, the electrode pattern may be: indium tin oxide (ITO), indium zinc oxide. One of indium zinc oxide (IZO) and zinc oxide (ZnO) is formed on the base substrate.

That is, unlike the structure of FIG. 5, as shown in FIG. 6, a touch panel in which an adhesive material layer 220 is bonded to a lower portion of a transparent window 200 can implement a structure including: a base substrate 230 is disposed on a surface of the transparent window 200 with the adhesive material layer 220; and the first and second sensing electrode patterns 232 are patterned on one surface of the base substrate 230 and the other surface opposite to the surface on. Moreover, the structure of the touch panel may further include: a protective film 210 for protecting the sensing electrode pattern on a lower surface of the base substrate 230. Of course, in this example, on the transparent window 200 described above, the printed pattern P illustrated in FIGS. 3 and 4 can be formed as a multilayer stacked structure having a stepped structure.

That is, as shown in FIG. 7, a transparent window 300 can be formed; a sensing electrode pattern 312 can be patterned on a section of a base substrate 310; and a wire portion 311 can be formed in synchronization with the sensing electrode pattern. . However, the first and second sensing electrode patterns are This system is implemented on the same plane. Moreover, the first sensing electrode pattern layer that determines a first axis (eg, an X-axis) component of a contact can be patterned on a surface to determine a second axis (eg, a Y-axis) component of a contact. The second sensing electrode pattern layer may be patterned by insulating the second sensing electrode pattern layer from the first sensing electrode pattern layer by performing an arrangement. In this example, as described above, the printed pattern P having a stepped structure in FIG. 4 may be formed on one surface of the transparent window 300.

Of course, for example, FIG. 7 illustrates a structure in which the sensing electrode pattern layer is formed on the same plane as the individual base substrate 310. However, without the base substrate 310, the electrode pattern layer can be directly formed on one surface of the transparent window 300 by a deposition process and a coating process of the middle sensing electrode pattern.

The touch screen according to still another experimental embodiment of the present invention can be combined with various different display devices. That is, the display device may be an organic light emitting device, a plasma display panel, or a liquid crystal display device. In this case, in order to prevent a contact sensor panel from being driven by the driving display device to be transferred to the touch panel and causing a malfunction, a shield layer may be selectively disposed on the contact sensing panel and the display device. between.

In the above, the embodiments of the present invention have been described in detail, but it will be apparent to those skilled in the art that Numerous other modifications and embodiments within the spirit and scope of the invention. Therefore, the description of the specific embodiments of the invention is not intended to limit the invention, and all modifications within the scope of the disclosed embodiments and other embodiments should be construed as being included in the invention. Within the scope of application.

10‧‧‧ Transparent window

20‧‧‧lower electrode layer

30‧‧‧Lower optical adhesive

40‧‧‧ upper electrode layer

50‧‧‧Upper optical adhesive

60‧‧‧LCD panel

100‧‧‧Transparent window

101‧‧‧Printed pattern

102‧‧‧Printed pattern

110, 130‧‧‧ base substrate

111‧‧‧ wire pattern

112‧‧‧Sensor electrode pattern

131‧‧‧Wire pattern

132‧‧‧Sensor electrode pattern

140‧‧‧Adhesive material layer

200‧‧‧ Transparent window

210‧‧‧Protective film

220‧‧‧Adhesive material layer

230‧‧‧Base substrate

232‧‧‧Sensor electrode pattern

300‧‧‧ Transparent window

310‧‧‧Base substrate

311‧‧‧Wire Department

312‧‧‧Sensor electrode pattern

A1, A2‧‧ Air Zone

C‧‧‧ joint area

P’, P‧‧‧ connection pads

TSP‧‧‧ touch screen panel

V/A‧‧‧ viewing area

D/A‧‧ ‧ shaded area

The following drawings are presented to better illustrate the invention and are part of this specification. The embodiments of the present invention are described in conjunction with the following drawings, wherein: FIG. 1 and FIG. 2 are conceptual diagrams showing a structure of a conventional touch screen; FIGS. 3 and 4 are diagrams according to the present invention. There is a conceptual diagram of a structure that forms a printed pattern; and Figures 5 through 7 illustrate various experimental embodiments of a structure of a touch panel in accordance with the present invention.

100‧‧‧Transparent window

101’‧‧‧ Printed pattern

102'‧‧‧Printed pattern

111‧‧‧ wire pattern

112‧‧‧Sensor electrode pattern

140‧‧‧Adhesive material layer

A1, A2‧‧ Air Zone

P’‧‧‧ connection pad

TSP‧‧‧ touch screen panel

V/A‧‧‧ viewing area

D/A‧‧ ‧ shaded area

Claims (12)

A touch screen includes: a transparent window; a touch panel bonded to a surface of the transparent window by an adhesive material layer; and a first printed pattern on the transparent window or the touch panel And a second printed pattern is located on the first printed pattern, wherein the length of the first printed pattern is greater than the length of the second printed pattern. The touch screen of claim 1, further comprising a first air zone formed between the adhesive material layer and the first printed pattern, and a second air zone formed on the adhesive material layer and Between the second printed patterns, wherein the first air zone and the second air zone are separated and not connected to each other. The touch screen of claim 1, wherein the second printed pattern is separated from the transparent window by the first printed pattern. The touch screen of claim 1, wherein the adhesive material layer is disposed in a space between the first and second printed patterns and the touch panel. The touch screen of claim 1, wherein the transparent window comprises a viewing area and a shielding area, a first thickness of the adhesive material layer corresponds to the viewing area, and a second layer of the adhesive material layer The thickness corresponds to the shielding area, and the first thickness and the second thickness are different from each other. The touch screen of claim 5, wherein the first printed pattern is disposed on the transparent window, the adhesive material layer includes a first surface facing the transparent window, and a second surface facing the touch a panel having a first distance between the second surface of the layer of adhesive material in the viewing zone and the transparent window, and between the second surface of the layer of adhesive material and the transparent window in the masking region There is a second distance, and the first distance is the same as the second distance. The touch screen of claim 1, wherein the second printed pattern comprises a surface roughness. The touch screen of claim 1, further comprising a third print pattern on the second print pattern. The touch screen of claim 8, wherein the length of the second printed pattern is greater than the length of the third printed pattern. The touch screen of claim 1, wherein the touch panel comprises: a first base substrate, a first sensing electrode pattern on the first base substrate; and a second base substrate, The second sensing electrode pattern is located on the second base substrate, wherein the first sensing electrode pattern is disposed toward the adhesive material layer. The touch panel of claim 1, wherein the touch panel comprises: a base substrate, a first sensing electrode is located on a surface of the base substrate, and a second sensing electrode is located On the other surface of the base substrate, the first sensing electrode is disposed toward the adhesive material layer. The touch panel of claim 1, wherein the touch panel comprises: a base substrate, and a first sensing electrode pattern and a second sensing electrode pattern formed on the base substrate Surfaces are patterned to insulate each other.