JP2011180806A - Touch panel and display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To uniform a reaction value to a finger touch in a touch panel to be powered from one of detection electrodes. <P>SOLUTION: A capacitive touch panel has a substrate, a plurality of X electrodes extended in a second direction and arranged in a first direction crossing the second direction on the substrate, and a plurality of Y electrodes extended in the first direction across the X electrodes and arranged in the second direction on the substrate. A driving voltage is supplied from one of the plurality of X electrodes and the plurality of Y electrodes. The X electrodes and Y electrodes includes pad portions and thin line portions formed alternately in the direction of extension. When A is the width of the thin line portion closest to the power supply end of at least either the X or Y electrodes, and B is the width of the thin line portion farthest from the power supply end of at least either of the electrode, B≥2×A is satisfied. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a touch panel and a display device, and more particularly to a technique effective in reducing the width of a frame region outside an effective touch region.

A display device provided with a device (hereinafter also referred to as a touch sensor or a touch panel) for inputting information by performing a touch operation (contact pressing operation, hereinafter simply referred to as touch) using a user's finger or pen on a display screen. It is used in mobile electronic devices such as PDAs and portable terminals, various home appliances, and automated teller machines.
As such a touch panel, a resistance film method for detecting a change in resistance value of a touched portion, a capacitance method for detecting a change in capacitance, an optical sensor method for detecting a change in light amount, or the like is known.
The electrostatic capacity method has the following advantages when compared with the resistive film method and the optical sensor method. For example, the resistance film method and the optical sensor method have a transmittance as low as about 80%, whereas the capacitance method has an advantage of a high transmittance of about 90% and does not deteriorate the display image quality. In the resistive film method, the touch position is detected by mechanical contact of the resistive film, so that the resistive film may be deteriorated or damaged, whereas in the capacitive system, the detection electrode is in contact with other electrodes. There is no such mechanical contact, which is advantageous from the viewpoint of durability.
As a capacitive touch panel, for example, there is a system as disclosed in Patent Document 1 below. In this disclosed method, a detection vertical electrode (hereinafter referred to as an X electrode) and a detection horizontal electrode (hereinafter referred to as a Y electrode) arranged in a vertical and horizontal two-dimensional matrix are provided, and input processing is performed. The capacitance of each electrode is detected by the unit. When a conductor such as a finger touches the surface of the touch panel, the capacity of each electrode increases. This is detected by the input processing unit, and the input coordinates are calculated based on the capacitance change signal detected by each electrode. .

JP 2008-310550 A

In the electrostatic capacity type touch panel described in Patent Document 1, a wiring (hereinafter referred to as a lead wiring) is drawn from one side of a Y electrode and connected to a terminal connected to a flexible wiring board. A drive voltage is supplied from one side of the electrode. Hereinafter, such a method is referred to as a one-sided power supply type touch panel.
On the other hand, the capacitive touch panel determines the presence or absence of finger touch based on the change in the capacitance of the X electrode and the Y electrode due to finger touch. The sensitivity at this time is affected by the capacitance and resistance of the X electrode and Y electrode itself, and if the capacitance is large, the change in capacitance when touched cannot be captured. When the resistance is large, the electrodes (X electrode, Y electrode) cannot be charged sufficiently, and the reaction value becomes small with respect to the finger touch and the sensitivity is deteriorated.
In addition, when the response value of the finger touch varies within the effective touch area, a partially insensitive area occurs, which affects the operation. In particular, in a single-sided power supply type touch panel, the electrode parallel to the long side of the touch panel (X electrode in this embodiment) has a long wiring length, so the load increases at the far end far from the power supply end. A phenomenon may appear.
The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to uniformize the response value to a finger touch in a touch panel that supplies power from one side of a detection electrode. It is to provide a technology that makes it possible.
The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

Of the inventions disclosed in this application, the outline of typical ones will be briefly described as follows.
(1) A substrate, a plurality of X electrodes extending in a second direction on the substrate and arranged side by side in a first direction intersecting the second direction, and the X on the substrate A plurality of Y electrodes extending in the first direction intersecting with the electrodes and arranged in the second direction, and driving voltage is applied from one side of the plurality of X electrodes and the plurality of Y electrodes. A capacitive touch panel to be supplied, wherein the X electrode and the Y electrode are formed such that pad portions and fine wire portions are alternately arranged in the extending direction, and at least one of the X electrode and the Y electrode B ≧ 2 × A is satisfied, where A is the width of the thin line portion closest to the feeding end of the electrode and B is the width of the thin line portion farthest from the feeding end of the at least one electrode.

(2) In (1), the film thickness of the thin line portion farthest from the feeding end of at least one of the X electrode and the Y electrode is larger than the film thickness of the thin line portion closest to the feeding end of the at least one electrode. Also thick.
(3) In (1), the shape of the pad portion farthest from the feeding end of at least one of the X electrode and the Y electrode is smaller than the shape of the pad portion closest to the feeding end of the at least one electrode. A dummy electrode is provided around the pad portion farthest from the power feeding end of at least one of the X electrode and the Y electrode.
(4) In (1), a metal layer is provided on the thin line portion farthest from the feeding end of at least one of the X electrode and the Y electrode.
(5) In (1), one end of each of the plurality of X electrodes and the plurality of Y electrodes is connected to a lead wire, and each lead wire is formed on one side of the substrate. A resistive element for equalizing the touch reaction value in the touch area is connected in the middle of each of the lead lines.

The effects obtained by the representative ones of the inventions disclosed in the present application will be briefly described as follows.
ADVANTAGE OF THE INVENTION According to this invention, in the touch panel electrically fed from the one side of a detection electrode, it becomes possible to equalize the reaction value with respect to a finger touch.

It is a figure for demonstrating the X electrode of the touchscreen of Example 1 of this invention. It is a figure for demonstrating an example of the specific electrode structure of the touchscreen of Example 1 of this invention. FIG. 3 is a main part sectional view showing a sectional structure along an A-A ′ connection line in FIG. 2; FIG. 3 is a main part sectional view showing a sectional structure along a B-B ′ connection line in FIG. 2; It is a figure for demonstrating the other example of the specific electrode structure of the touchscreen of Example 1 of this invention. FIG. 6 is a cross-sectional view of a main part showing a cross-sectional structure along the F-F ′ connection line of FIG. 5. It is principal part sectional drawing which shows the cross-section along the G-G 'connection line of FIG. It is a figure for demonstrating the X electrode of the touchscreen of Example 2 of this invention. It is a figure for demonstrating the problem of the touchscreen of Example 1 of this invention. It is a figure for demonstrating the X electrode of the touchscreen of Example 3 of this invention. It is a figure for demonstrating the lead-out wiring of the touchscreen of Example 4 of this invention. It is a figure for demonstrating the modification of the touchscreen of each Example of this invention. It is principal part sectional drawing which shows the cross-sectional structure along the A-A 'connection line of FIG. It is a figure for demonstrating the other modification of the touchscreen of each Example of this invention. It is principal part sectional drawing which shows the cross-section along the A-A 'connection line of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In all the drawings for explaining the embodiments, parts having the same functions are given the same reference numerals, and repeated explanation thereof is omitted. Also, the following examples are not intended to limit the interpretation of the scope of the claims of the present invention.
[Example 1]
FIG. 1 is a diagram for explaining an X electrode of the touch panel according to the first embodiment of the present invention.
As shown in FIG. 1A, the touch panel of the present embodiment extends in the second direction (Y direction) and has a predetermined arrangement pitch in the first direction (X direction) intersecting the second direction. And a plurality of Y electrodes (Y1) that extend in the first direction across the X electrodes and are arranged in the second direction at a predetermined arrangement pitch. To Y6).
Each of the plurality of X electrodes has an electrode pattern in which a plurality of thin wire portions 1a and a plurality of pad portions 1b having a width wider than the width of the thin wire portions 1a are alternately arranged in the second direction. Each of the Y electrodes has an electrode pattern in which a thin line portion 2a and a plurality of pad portions 2b having a width larger than the width of the thin line portion 2a are alternately arranged in the first direction.
Note that the X electrode and the Y electrode are formed of a highly conductive material, for example, a transparent conductive material such as ITO (Indium Tin Oxide).
The touch panel of the present embodiment is also a one-side power feeding type touch panel, and the X electrodes X1 to X4 are connected to the lead wires (LX1 to LX4), and the respective terminal portions (TX1 to TX4) formed on one side of the substrate 11. )It is connected to the.
One end of each of the Y electrodes Y1 to Y6 is connected to the lead-out wiring (LY1 to LY6), and is connected to each terminal portion (TY1 to TY6) formed on one side of the substrate 11. The Y electrode lead wires (LY1 to LY6) are alternately drawn left and right alternately. The lead wires (LX1 to LX4, LY1 to LY6) are formed of a metal layer such as a silver alloy film.

The capacitive touch panel determines the presence or absence of a finger touch based on a change in the capacitance of the X electrode and the Y electrode caused by a finger touch. The sensitivity at this time is affected by the capacitance and resistance of the X electrode and Y electrode itself, and if the capacitance is large, the change in capacitance when touched cannot be captured. When the resistance is large, the electrodes (X electrode, Y electrode) cannot be charged sufficiently, and the reaction value becomes small with respect to the finger touch and the sensitivity is deteriorated.
In addition, when the response value of the finger touch varies within the effective touch area, a partially insensitive area occurs, which affects the operation. In particular, in a one-side power supply type touch panel, an electrode parallel to the long side of the touch panel (X electrode in FIG. 1) has a long wiring length, so that the load increases at the far end far from the power supply end, and the phenomenon described above. May appear.
Therefore, in this embodiment, in order to eliminate the difference between the far and far ends of the finger touch response value, as shown in FIG. 1B, focusing on the thin line portion 1a that connects the electrodes that are greatly involved in the resistance value, As the distance from the end increases, the width of the thin line portion 1a is increased, and the width of the thin line portion 1af at the farthest end is set to be equal to or greater than twice the width of the thin line portion 1an at the nearest end (B ≧ 2 × A in FIG. 5). Thereby, the reaction value with respect to a finger touch can be equalized on the far end side far from the power feed end and the near and short sides near the power feed end.
In the present embodiment, with respect to the thin wire portion 1a of the X electrode, the width of the thin wire portion 1a is increased as the distance from the feeding end increases, and the width of the thin wire portion 1a at the farthest end is double that of the nearest end (FIG. 1 (b In B), the width of the thin wire portion 2a of the Y electrode is increased with increasing distance from the feeding end, and the width of the thin wire portion 2a at the farthest end is set to the nearest end. It is good also as 2 times the width | variety of this thin wire | line part 2a.

[Example of Specific Electrode Structure of Touch Panel of Example 1]
2 is a diagram for explaining a specific electrode structure of the touch panel according to the first embodiment of the present invention, and FIG. 3 is a cross-sectional view of a main part showing a cross-sectional structure taken along the line AA ′ of FIG. 4 and 4 are main part cross-sectional views showing a cross-sectional structure taken along the line BB 'in FIG.
In the touch panel shown in FIGS. 2 to 4, when viewed in a plan view, the pad portions 1b of the respective X electrodes and the pad portions 2b of the respective Y electrodes are arranged without overlapping, and the thin wire portions of the respective X electrodes. 1a intersects with the thin wire portion 2a of each Y electrode.
The thin wire portions 2a of the plurality of Y electrodes are formed in different layers from the thin wire portions 1a and the pad portions 1b of the X electrode. The plurality of Y electrode pad portions 2b are formed on the same layer as the X electrode thin wire portion 1a and the pad portion 1b, separately from the X electrode pad portion 1b. The thin wire portions 1 a and the pad portions 1 b of the plurality of X electrodes and the pad portions 2 b of the plurality of Y electrodes are formed on the substrate 11 and covered with the insulating film 12.
The thin wire portions 2a of the plurality of Y electrodes are formed on the insulating film 12 above the thin wire portion 1a of the X electrode, and the thin wire portions 2a of the plurality of Y electrodes are adjacent to each other with the thin wire portion 2a interposed therebetween. The two pad portions 2b are electrically connected through contact holes 12a formed in the insulating film 12, respectively. Each thin wire portion 2 a of the plurality of Y electrodes is covered with a protective film 13.
In the touch panel shown in FIGS. 2 to 4, a plurality of Y electrode thin wire portions 2a are formed on the substrate 11, the X electrode thin wire portions 1a and the pad portions 1b, and the plurality of Y electrode pad portions 2b. May be formed on the insulating film 12.

[Another Example of Specific Electrode Structure of Touch Panel of Example 1]
FIG. 5 is a diagram for explaining another example of the specific electrode structure of the touch panel according to the first embodiment of the present invention. FIG. 6 shows a cross-sectional structure taken along the line FF ′ in FIG. FIG. 7 is a fragmentary cross-sectional view showing a cross-sectional structure taken along the line GG ′ in FIG. 5.
Also in the touch panel shown in FIGS. 5 to 7, when viewed in a plan view, the pad portions 1b of the respective X electrodes and the pad portions 2b of the respective Y electrodes are arranged so as not to overlap with each other, and the fine wires of the respective X electrodes are arranged. The portion 1a and the thin wire portion 2a of each Y electrode intersect.
As shown in FIGS. 5 to 7, the touch panel shown in FIGS. 5 to 7 has an X electrode and a Y electrode formed in different layers with an insulating film 12 in between, and the X electrode is more than the Y electrode. The lower layer is formed on the surface on the viewer side on the substrate 11.

[Example 2]
FIG. 8 is a diagram for explaining the X electrode of the touch panel according to the second embodiment of the present invention.
In the present embodiment, as shown in FIG. 8, the pad portion on the far end side farthest from the power feeding end as compared to the dimension (or area) of the pad portion 1bn closest to the power feeding end in the X electrode. The size (or area) of 1bf is reduced, and a floating electrode 1c is further added.
As a result, the charging time can be shortened and the capacitance between adjacent electrodes can be reduced, so that the touch response value of the pad portion 1bf farthest from the power feeding end in the X electrode can be improved.
In this embodiment, the size (or area) of the pad portion 1bf on the far end side from the power feed end in the X electrode is reduced and the floating electrode 1c is added. Further, the size (or area) of the pad portion 2b on the far end side may be reduced and a floating electrode may be added.
In this embodiment, in the X electrode (or Y electrode), the size (or area) of the pad portion 1b (or pad portion 2b) on the far end side farthest from the power feeding end is reduced, and the floating electrode 1c is further reduced. However, the size (or area) of the plurality of pad portions 1b (or pad portions 2b) on the far end side far from the power supply end in the X electrode (or Y electrode) is reduced, and the floating electrode 1c is further reduced. May be added. In this case, the size (or area) is reduced, and the number of pad portions 1b (or pad portions 2b) to which the floating electrode 1c is added is equalized in the response value to the finger touch in the X electrode (or Y electrode). What is necessary is just to set it. Further, the dimension (or area) of the pad portion 1b (or pad portion 2b) of the X electrode (or Y electrode) is gradually decreased as the distance from the power feeding end is increased, and the dimension (or area) of the floating electrode 1c is decreased. You may make it enlarge gradually as it distances from.
Further, by adding the configuration of the present embodiment to the configuration of the first embodiment described above, it is possible to improve the touch response value of the pad portion 1bf farthest from the power feeding end. FIG. 5 shows the configuration in this case.

[Example 3]
In the case of the electrode structure of Example 1 described above, the width of the thin wire portion 1a is increased with increasing distance from the power supply end of the thin wire portion 1a of the X electrode. The area of the pad portion 2b of the Y electrode having the fine wire portion 2a intersecting with the fine wire portion 1a farthest from the end is also reduced. In addition, FIG. 9 is a figure for demonstrating the problem of the touchscreen of Example 1 of this invention.
FIG. 10 is a diagram for explaining the touch panel according to the third embodiment of the present invention.
In this embodiment, as shown in an enlarged view in FIG. 10A, the resistance of the X electrode is reduced by laminating a metal layer MT on the thin wire portion 1a farthest from the feeding end. Thereby, compared with the case of the above-described first embodiment shown in FIG. 1, the wiring width of the thin wire portion 1a farthest from the feeding end in the X electrode can be narrowed, so that the X electrode and the Y electrode are more difficult to recognize. It is possible. Furthermore, since the sizes of the X electrode and the Y electrode can be made uniform, the linearity can be improved.
In the present embodiment, the metal layer MT is laminated on the thin wire portion 1a farthest from the feeding end in the X electrode to reduce the resistance. However, the metal layer MT is placed on the thin wire portion 2a farthest from the feeding end in the Y electrode. The resistance may be reduced by stacking.
In this embodiment, instead of reducing the resistance by laminating the metal layer MT on the thin wire portion 1a (or thin wire portion 2a) farthest from the feeding end in the X electrode (or Y electrode), the X electrode (or Y electrode) is used. In the electrode), the thickness of the thin wire portion 1a (or the thin wire portion 2a) farthest from the power feeding end may be increased to reduce the resistance. Also in this case, it is possible to make it difficult to recognize the X electrode and the Y electrode. Furthermore, since the sizes of the X electrode and the Y electrode can be made uniform, the linearity can be improved.
In FIG. 10, the metal layer MT is stacked on the thin wire portion 1a (or the thin wire portion 2a) farthest from the feeding end in the X electrode (or Y electrode), but in the X electrode (or Y electrode), The metal layer MT may be stacked on a plurality of thin wire portions 1a (or thin wire portions 2a) on the far end side far from the power supply end. In this case, the number of thin wire portions 1a (or thin wire portions 2a) on which the metal layer MT is stacked may be set so that the sizes of the X electrode and the Y electrode are uniform.
The present embodiment can also be applied to a normal touch panel, that is, a touch panel having a uniform width of the thin electrode portion 1a (or thin wire portion 2a) of the X electrode (or Y electrode).

[Example 4]
FIG. 11 is a diagram for explaining the lead-out wiring of the touch panel according to the fourth embodiment of the present invention.
As shown in FIG. 11, in this embodiment, a resistance element (R1) of 100 kΩ or more is connected to the lead-out wirings (LX1 to LX4, LY1 to LY6), and the resistance value of the X electrode varies within the effective touch region. Alternatively, the variation of the resistance value of the Y electrode is not surfaced, and the response value to the touch in the effective touch area is made uniform. Furthermore, this embodiment is also effective against noise.

[Modified example of touch panel of each embodiment described above]
In the one-side power supply type touch panel, an inspection pad is provided on the other side of the Y electrode in order to inspect for disconnection of the Y electrode and the lead wiring of the Y electrode.
In the touch panel shown in Patent Document 1, it is desirable to draw out the lead lines alternately in order to make the width of the outer frame outside the effective touch area equal to the left and right and the minimum width. However, in order to prevent erroneous recognition of the touch position of the touch panel due to capacitive coupling between the lead-out wiring provided outside the effective touch area and the test pad, the lead-out wiring is arranged in a further outer area of the test pad. ing.
Therefore, the width of the frame is widened. Therefore, if the inspection pad is omitted in order to narrow the frame, there is a problem that the disconnection inspection of the Y electrode and the lead-out wiring of the Y electrode cannot be performed.
Hereinafter, a modification for narrowing the width of the frame area outside the effective touch area in a touch panel in which a test pad is arranged on the other side of the Y electrode and power is supplied from one side of the Y electrode will be described.

FIG. 12 is a view for explaining a modification of the touch panel of each embodiment of the present invention, and FIG. 13 is a cross-sectional view of a main part showing a cross-sectional structure taken along the line AA ′ of FIG. .
In the touch panel shown in FIG. 12 and FIG. 13, the X electrode is composed of five X electrodes X1 to X5, and each X electrode is connected to the lead-out wiring (LX1 to LX5), and one side of the substrate 11 Are connected to the respective terminal portions (TX1 to TX5) formed in the above.
The Y electrode is composed of six Y electrodes Y1 to Y6, and each Y electrode is formed on one side of the substrate 11 with one end connected to the lead-out wiring (LY1 to LY6). It is connected to each terminal part (TY1-TY6). The Y electrode lead wires (LY1 to LY6) are alternately drawn left and right alternately. The lead wires (LX1 to LX4, LY1 to LY6) are formed in a region outside the effective touch region (the region indicated by the arrow A in FIG. 8), and are formed of a metal layer such as a silver alloy film.
Further, the other end of the Y electrode is connected to inspection pads (PY1 to PY6) for inspecting electrical continuity.
The inspection pads (PY1 to PY6) are arranged on Y electrode lead-out wirings (LY1 to LY6) alternately drawn left and right alternately. An active shield electrode (ASC) is formed between the test pads (PY1 to PY6) and the Y electrode lead wirings (LY1 to LY6).
Thus, the touch panel shown in FIGS. 12 and 13 has a structure in which the active shield electrode (ASC) is sandwiched between the test pads (PY1 to PY6) and the Y electrode lead-out wirings (LY1 to LY6). ing.
The inspection pads (PY1 to PY6) are the same layer as the thin wire portion 1a and the pad portion 1b of the X electrode and the pad portion 2b of the Y electrode, and are formed of a transparent conductive film such as ITO like the X electrode and the Y electrode. . This eliminates the need for film formation or processing for a new inspection pad.

The touch panel requires that the X electrode and the Y electrode be securely connected to the terminal portion provided on one side of the substrate by the lead wiring in order to be able to detect the change in capacitance of each electrode due to the finger touch. If there is a break on each electrode or in the middle of each lead-out line, the capacitance cannot be detected by finger touch.
Therefore, in the touch panel shown in FIG. 12 and FIG. 13, at the time of manufacturing the product, the electrical continuity between each terminal portion (TY1 to TY6) and the inspection pad (PY1 to PY6) is inspected, and disconnection in the middle is recognized. The touch panel thus manufactured can be eliminated as a defective product, and a touch panel with a high yield during manufacturing can be realized.
During normal operation, the same voltage as the drive voltage supplied to the Y electrodes (Y1 to Y6) is supplied from the terminal portion (TASC) to the active shield electrode (ASC). Thereby, the capacitive coupling between the test pads (PY1 to PY6) and the Y electrode lead-out wirings (LY1 to LY6) can be suppressed, and the capacitive coupling between the Y electrodes can be suppressed. As a result, a touch panel with high position determination accuracy can be realized.
For example, an inspection pad (PY5) arranged at the other end of the Y electrode of Y5 is arranged on the Y electrode lead wiring (LY6) of Y6, and an active shield electrode (ASC) is arranged therebetween. However, crosstalk due to capacitive coupling between the Y electrode of Y5 and the Y electrode of Y6 can be suppressed. Similarly, test pads (PY1 to PY6) of other Y electrodes are arranged on the lead wires (LY1 to LY6) of each Y electrode, and by arranging an active shield electrode (ASC) between them, Crosstalk due to capacitive coupling between the Y electrode lead wires (LY1 to LY6) and the other Y electrodes can be suppressed.

If a finger touch is made on the Y6 Y electrode, a capacitance change due to the finger touch occurs on the Y6 Y electrode. The touch panel controller detects this and determines that a finger touch has been made on the Y electrode of Y6.
In such a case, if crosstalk occurs between the Y electrode of Y6 and the Y electrode of Y5, the touch panel controller detects that the capacitance on the Y electrode of Y5 is slightly changed. Therefore, it is erroneously determined that there is a finger touch between the Y electrode of Y5 and the Y electrode of Y6.
In this way, when crosstalk occurs, the accuracy of position determination is impaired by determining a position shifted from the position originally touched by a finger.
Therefore, the active shield electrode (ASC) to which the same voltage as the drive voltage supplied to the Y electrode during normal operation is provided between the test pads (PY1 to PY6) and the Y electrode lead-out wirings (LY1 to LY6). Since the crosstalk can be suppressed by adopting the sandwiched structure, a touch panel with high position determination accuracy can be realized.
Furthermore, since the test pads (PY1 to PY6) are arranged on the originally required lead wires (LY1 to LY6), it is not necessary to widen the frame area for the test pads (PY1 to PY6), and the touch panel has high design. Can be realized.
Moreover, the active shield electrode (ASC) can be formed in the same process as the thin line portion 2a of the Y electrode for forming the intersection of the X electrode and the Y electrode. Accordingly, it is not necessary to newly form a conductive film (for example, ITO) in order to form the active shield electrode (ASC), and the manufacturing process can be simplified.
The X electrode lead wires (LX1 to LX5) and the Y electrode lead wires (LY1 to LY6) are connected to the X electrodes (X1 to X5) through through holes (not shown) formed in the insulating film 12. ) And one end of each of the Y electrodes (Y1 to Y6).

[Other variations of the touch panel of each of the foregoing embodiments]
FIG. 14 is a view for explaining another modified example of the touch panel of each embodiment of the present invention, and FIG. 15 is a cross-sectional view of an essential part showing a cross-sectional structure along the line AA ′ in FIG. It is.
In the touch panel shown in FIGS. 14 and 15, inspection pads (PY1 to PY6) are formed outside the terminal portions (TX1 to TX5, TY1 to TY6) on one side where the terminal portion of the substrate 11 is formed. The pads (PY1 to PY6) and the other end of the Y electrode are connected by inspection lead wires (LPY1 to LPY6).
In the touch panel shown in FIGS. 14 and 15, the inspection lead wires (LPY1 to LPY6) are in the same layer as the thin electrode portion 1a and the pad portion 1b of the X electrode and the pad portion 2b of the Y electrode. Similarly, it is formed of a transparent conductive film such as ITO. This eliminates the need for film formation or processing for a new inspection pad.
14 and 15, the inspection lead wires (LPY1 to LPY6) are arranged on the active shield electrode (ASC), and together with the Y electrode lead wires (LY1 to LY6) made of a metal layer, It has a layered wiring structure.

Therefore, the touch panels shown in FIGS. 14 and 15 also use the inspection lead wires (LPY1 to LPY6) between the inspection pads (PY1 to PY6) and the terminal portions (TY1 to TY6) when manufacturing the product. Thus, it is possible to eliminate a touch panel in which a disconnection is recognized as a defective product, and to realize a touch panel with a high yield during manufacturing.
In the normal operation, the same voltage as the drive voltage supplied to the Y electrodes (Y1 to Y6) is supplied to the active shield electrode (ASC). Thereby, capacitive coupling between the test pads (PY1 to PY6) and the active shield electrode (ASC) can be suppressed, and capacitive coupling between the Y electrodes can be suppressed. As a result, a touch panel with high position determination accuracy can be realized.
Furthermore, by adopting such a structure, it is not necessary to widen the frame area for the inspection pads (PY1 to PY6), and a touch panel with high design can be realized.
Moreover, the active shield electrode (ASC) can be formed in the same process as the thin line portion 2a of the Y electrode for forming the intersection of the X electrode and the Y electrode. Thus, it is not necessary to newly form a conductive film (for example, ITO) in order to form the active shield electrode (ASC), and the manufacturing process can be simplified.

In the touch panel shown in FIGS. 12 to 15, the other end of the X electrode is connected to inspection pads (PX1 to PX5) for inspecting electrical continuity. Accordingly, in the touch panel shown in FIGS. 12 to 15, the electrical continuity between the terminal portions (TX1 to TX5) and the inspection pads (PX1 to PX5) is inspected during the manufacture of the product, and a disconnection in the middle is detected. The recognized touch panel can be eliminated as a defective product, and a touch panel with a high yield during manufacturing can be realized. The inspection pads (PX1 to PX5) are formed of a transparent conductive film such as ITO similarly to the X electrode and the Y electrode.
In the touch panel shown in FIGS. 12 to 15, the shape of the pad portion 1b of the peripheral X electrode and the pad portion 2b of the Y electrode is half that of the central pad portion.
By the way, as described above, one of the causes that the response value of the finger touch varies is that the load increases at the far end far from the power feeding end. However, in the touch panels shown in FIGS. 12 to 15, the pad portions (1b, 2b) farthest from the power feeding end in the X electrode or the Y electrode have a half shape, so that the load is also almost halved. The thin wire portions (1a, 1b) or the pad portions (1b, 2b) to which the first to third embodiments are applied are one before the thin wire portion farthest from the feeding end in the X electrode or the Y electrode. The thin wire portions (1a, 1b) or the pad portions (1b, 2b) may be used.
In addition, as described above, the touch panel of each of the above-described embodiments is disposed on a display panel of a liquid crystal display device or an organic EL display device, and is touched by using a user's finger or pen on the display screen. Used as a device for inputting information.
As mentioned above, the invention made by the present inventor has been specifically described based on the above embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Of course.

1a, 2a, 1an, 1af Fine line portion 1b, 2b, 1bn, 1bf Pad portion 1c Floating electrode 11 Substrate 12 Insulating film 12a Contact hole 13 Protective film X1 to X5 X electrode Y1 to Y6 Y electrode LX1 to LX5, LY1 to LY6 Wiring TX1-TX5, TY1-TY6 Terminal section PX1-PX5, PY1-PY6 Inspection pad ASC Active shield electrode MT Metal layer R1 Resistance

Claims (13)

A substrate,
A plurality of X electrodes extending in a second direction on the substrate and provided side by side in a first direction intersecting the second direction;
A plurality of Y electrodes extending in the first direction intersecting with the X electrode and disposed side by side in the second direction on the substrate;
A capacitive touch panel that supplies a driving voltage from one side of the plurality of X electrodes and the plurality of Y electrodes,
The X electrode and the Y electrode are formed such that pad portions and fine wire portions are alternately arranged in the extending direction,
When the width of the thin line portion closest to the feeding end of at least one of the X electrode and the Y electrode is A and the width of the thin line portion farthest from the feeding end of the at least one electrode is B, B ≧ 2 × A touch panel characterized by satisfying A.   The thin film portion farthest from the feeding end of at least one of the X electrode and the Y electrode is thicker than the thin wire portion closest to the feeding end of the at least one electrode. Item 10. The touch panel according to item 1. The shape of the pad portion farthest from the feeding end of at least one of the X electrode and the Y electrode is smaller than the shape of the pad portion closest to the feeding end of the at least one electrode,
The touch panel according to claim 1, further comprising a dummy electrode around a pad portion farthest from a power feeding end of at least one of the X electrode and the Y electrode.   2. The touch panel according to claim 1, further comprising a metal layer on a thin line portion farthest from a power feeding end of at least one of the X electrode and the Y electrode. Lead wires are connected to one ends of the plurality of X electrodes and the plurality of Y electrodes,
Each lead wire is connected to a terminal corresponding to each lead wire formed on one side of the substrate,
The touch panel according to claim 1, wherein a resistance element for equalizing a touch reaction value in the touch region is connected in the middle of each of the lead wirings. A substrate,
A plurality of X electrodes extending in a second direction on the substrate and provided side by side in a first direction intersecting the second direction;
A plurality of Y electrodes extending in the first direction intersecting with the X electrode and disposed side by side in the second direction on the substrate;
A capacitive touch panel that supplies a driving voltage from one side of the plurality of X electrodes and the plurality of Y electrodes,
The X electrode and the Y electrode are formed such that pad portions and fine wire portions are alternately arranged in the extending direction,
The thin film portion farthest from the feeding end of at least one of the X electrode and the Y electrode is thicker than the thin wire portion closest to the feeding end of the at least one electrode. . A substrate,
A plurality of X electrodes extending in a second direction on the substrate and provided side by side in a first direction intersecting the second direction;
A plurality of Y electrodes extending in the first direction intersecting with the X electrode and disposed side by side in the second direction on the substrate;
A capacitive touch panel that supplies a driving voltage from one side of the plurality of X electrodes and the plurality of Y electrodes,
The X electrode and the Y electrode are formed such that pad portions and fine wire portions are alternately arranged in the extending direction,
The shape of the pad portion farthest from the feeding end of at least one of the X electrode and the Y electrode is smaller than the shape of the pad portion closest to the feeding end of the at least one electrode,
A touch panel comprising a dummy electrode around a pad portion farthest from a power feeding end of at least one of the X electrode and the Y electrode. A substrate,
A plurality of X electrodes extending in a second direction on the substrate and provided side by side in a first direction intersecting the second direction;
A plurality of Y electrodes extending in the first direction intersecting with the X electrode and disposed side by side in the second direction on the substrate;
A capacitive touch panel that supplies a driving voltage from one side of the plurality of X electrodes and the plurality of Y electrodes,
The X electrode and the Y electrode are formed such that pad portions and fine wire portions are alternately arranged in the extending direction,
A touch panel comprising a metal layer on a thin line portion farthest from a power feeding end of at least one of the X electrode and the Y electrode. A substrate,
A plurality of X electrodes extending in a second direction on the substrate and provided side by side in a first direction intersecting the second direction;
A plurality of Y electrodes extending in the first direction intersecting with the X electrode and disposed side by side in the second direction on the substrate;
A capacitive touch panel that supplies a driving voltage from one side of the plurality of X electrodes and the plurality of Y electrodes,
The X electrode and the Y electrode are formed such that pad portions and fine wire portions are alternately arranged in the extending direction,
One end of each of the plurality of X electrodes and the plurality of Y electrodes is connected to a lead wiring,
Each lead wire is connected to a terminal corresponding to each lead wire formed on one side of the substrate,
A touch panel, wherein a resistance element for equalizing a reaction value to a finger touch is connected in the middle of each of the lead wires. When viewed in a plan view, the pad portion of each X electrode and the pad portion of each Y electrode are arranged without overlapping, and the thin wire portion of each X electrode and the thin wire of each Y electrode Intersects the department,
The pad portion and the fine wire portion of each X electrode and the pad portion of the Y electrode are formed in the same layer,
The fine line portion of each Y electrode is formed in a lower layer than the pad portion of each Y electrode, and is formed in an insulating film between the pad portion of each Y electrode and the thin line portion of each Y electrode. The touch panel according to any one of claims 1 to 9, wherein the touch panel is connected to a pad portion of each Y electrode through a contact hole. When viewed in a plan view, the pad portion of each X electrode and the pad portion of each Y electrode are arranged without overlapping, and the thin wire portion of each X electrode and the thin wire of each Y electrode Intersects the department,
The pad portion and the fine wire portion of each X electrode and the pad portion of the Y electrode are formed in the same layer,
The fine wire portion of each Y electrode is formed in an upper layer than the pad portion of each Y electrode, and is formed in an insulating film between the pad portion of each Y electrode and the fine wire portion of each Y electrode. The touch panel according to any one of claims 1 to 9, wherein the touch panel is connected to a pad portion of each Y electrode through a contact hole. When viewed in a plan view, the pad portion of each X electrode and the pad portion of each Y electrode are arranged without overlapping, and the thin wire portion of each X electrode and the thin wire of each Y electrode Intersects the department,
10. The X electrode and the Y electrode are formed in different layers with an insulating film interposed therebetween, and the X electrode is formed in a lower layer than the Y electrode. The touch panel according to any one of the above items. A display panel;
A touch panel disposed on the viewer side of the display panel,
The display device according to claim 1, wherein the touch panel is the touch panel according to claim 1.

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