Electrostatic capacitance type touch panel and screen input display device including the same

• US 8,638,313 B2
• Filed: 04/15/2009
• Issued: 01/28/2014
• Est. Priority Date: 04/16/2008
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Japan Display Incorporated, Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: Kinoshita, Masayoshi, Mamba, Norio, Hatano, Mutsuko
• Primary Examiner(s): Beck, Alexander S
• Assistant Examiner(s): Holland, James M
• Application Number:
  US12/423,858
• Publication Number:
  US 20090262095A1
• Time in Patent Office: 1,749 Days
• Field of Search: 345/174, 345/173, 341/34, 349/149
• US Class Current: 345/174
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

An electrostatic capacitance type touch panel includes: a substrate; a plurality of first electrodes disposed in parallel on the substrate; an insulating film formed so as to cover the plurality of first electrodes; a plurality of second electrodes disposed in parallel to intersect the plurality of first electrodes on the insulating film; a plurality of first drawing wiring lines connected to the plurality of first electrodes to be drawn to a connection terminal; and a plurality of second drawing wiring lines connected to the plurality of second electrodes to be drawn to the connection terminal. The plurality of first drawing wiring lines have different lengths, larger widths as the lengths are shorter, and larger intervals between adjacent two of the plurality of first drawing wiring lines as the lengths are longer.

Claims

1. An electrostatic capacitance type touch panel, comprising:

a substrate;

a plurality of first electrodes disposed in parallel on the substrate;

an insulating film formed so as to cover the plurality of first electrodes;

a plurality of second electrodes disposed in parallel to intersect the plurality of first electrodes on the insulating film;

a plurality of first drawing wiring lines connected to the plurality of first electrodes to be drawn to a connection terminal; and

a plurality of second drawing wiring lines connected to the plurality of second electrodes to be drawn to the connection terminal;

wherein the plurality of first or second drawing wiring lines have different lengths;

wherein the plurality of first or second drawing wiring lines have different widths in accordance with a length thereof so that a width of a shortest length of the plurality of first or second drawing wiring lines is a widest width and a width of the longest length of the plurality of first or second drawing wiring lines is a narrowest width; and

wherein the plurality of first or second drawing wiring lines have different intervals between adjacent two of the plurality of first or second drawing wiring lines as the lengths are longer so that the interval between the adjacent two of the plurality of first or second drawing wiring lines having the longest lengths is largest and the interval between the adjacent two of the plurality of first or second drawing wiring lines having the shortest lengths is smallest.

2. An electrostatic capacitance type touch panel according to claim 1, wherein each of the plurality of first electrodes and the plurality of second electrodes is formed so that pad portions and thin line portions thinner than the pad portions are alternately arrayed in an extending direction of the each of the plurality of first electrodes and the plurality of second electrodes, and in plan view, the pad portions of the plurality of first electrodes and the pad portions of the plurality of second electrodes are arranged so as not to overlap each other.

3. An electrostatic capacitance type touch panel according to claim 1, wherein:

the plurality of first electrodes comprise a transparent conductive layer;

the plurality of first drawing wiring lines are formed into a two-layer structure including a transparent conductive layer and a metal layer;

the plurality of second electrodes comprise a transparent conductive layer; and

the plurality of second drawing wiring lines are formed into a two-layer structure including a transparent conductive layer and a metal layer.

13. An electrostatic capacitance type touch panel according to claim 1, wherein the plurality of first or second drawing lines include at least three first or second drawing lines extending with different lengths from one another from an end of one of a column and row of the first and second electrodes to the connection terminal, adjacent ones of the first or second drawing lines having different lengths which increase in length from one another in one of a first and second direction with respect to the connector and having widths different from one another which decrease in width from one another in the one of the first and second direction, and intervals between each adjacent two of the at least three of the first or second drawing lines which increase from one another in the one of the first and second direction in which the lengths of the adjacent ones of the first and second drawing lines increase in length from the other.

17. An electrostatic capacitance type touch panel according to claim 1, wherein each of the first and second drawing wiring lines is a continuous conductive non-segmented drawing wiring line having a different length and a different width with respect to an adjacent drawing wiring line, and different intervals with respect to adjacent drawing wiring lines sufficient to enable diminishing of a capacitance difference among the plurality of first and second drawing wiring lines and to enable improvement of detection accuracy for the electrostatic capacitance type touch panel.

4. An electrostatic capacitance type touch panel, comprising:

a substrate;

a plurality of first electrodes disposed in parallel on the substrate;

an insulating film formed so as to cover the plurality of first electrodes;

a plurality of second electrodes disposed in parallel to intersect the plurality of first electrodes on the insulating film;

a plurality of first drawing wiring lines connected to the plurality of first electrodes to be drawn to a connection terminal; and

a plurality of second drawing wiring lines connected to the plurality of second electrodes to be drawn to the connection terminal, wherein;

the plurality of first drawing wiring lines have different lengths, the plurality of first drawing lines have larger widths as the lengths are shorter so that the first drawing wiring line having a shortest length has a widest width and the first drawing wiring line having a longest lengthy has a narrowest width, and the plurality of first drawing wiring lines have different intervals between adjacent two of the plurality of first drawing wiring lines as the lengths are longer so that the interval between the adjacent two first drawing wiring lines of the longest length is largest and the interval between the adjacent two first drawing wiring lines of the shortest lengths is narrowest; and

the plurality of second drawing wiring lines have different lengths, the plurality of second drawing lines have larger widths as the lengths are shorter so that the second drawing wiring line having a shortest length has a widest width and the second drawing wiring line having a longest length has a narrowest width, and the plurality of second drawing wiring lines have different intervals between adjacent two of the plurality of second drawing wiring lines as the lengths are longer so that the interval between the adjacent two second drawing wiring lines of the longest length is largest and the interval between the adjacent two second drawing wiring lines of the shortest lengths is narrowest.

5. An electrostatic capacitance type touch panel according to claim 4, wherein each of the plurality of first electrodes and the plurality of second electrodes is formed so that pad portions and thin line portions thinner than the pad portions are alternately arrayed in an extending direction of the each of the plurality of first electrodes and the plurality of second electrodes, and in plan view, the pad portions of the plurality of first electrodes and the pad portions of the plurality of second electrodes are arranged so as not to overlap each other.

6. An electrostatic capacitance type touch panel according to claim 4, wherein:

the plurality of first electrodes comprise a transparent conductive layer;

the plurality of first drawing wiring lines are formed into a two-layer structure including a transparent conductive layer and a metal layer;

the plurality of second electrodes comprise a transparent conductive layer; and

the plurality of second drawing wiring lines are formed into a two-layer structure including a transparent conductive layer and a metal layer.

14. An electrostatic capacitance type touch panel according to claim 4, wherein the plurality of first drawing lines include at least three first drawing lines extending with different lengths from one another from an end of one of a column and row of the first electrodes to the connection terminal, adjacent ones of the first drawing lines having different lengths which increase in length from one another in a first direction with respect to the connection terminal and having widths different from one another which decrease in width from one another in the first direction, and intervals between adjacent two of the at least three of the first drawing lines which increase from one another in the first direction in which the lengths of the adjacent ones of the first drawing lines increase in length from one another, and wherein the plurality of second drawing lines include at least three second drawing lines extending with different lengths from one another from an end of another of the column and row of the second electrodes to the connection terminal, adjacent ones of the second drawing lines having different lengths which increase in length from one another in a second direction opposite to the first direction with respect to the connection terminal and having widths different from one another which decrease in width from one another in the second direction, and intervals between each adjacent two of the at least three of the second drawing lines which increase from one another in the second direction in which the lengths of the adjacent ones of the second drawing lines increase in length from one another.

18. An electrostatic capacitance type touch panel according to claim 4, wherein each of the first and second drawing wiring lines is a continuous conductive non-segmented drawing wiring line having a different length and a different width with respect to an adjacent drawing wiring line, and different intervals with respect to adjacent drawing wiring lines sufficient to enable diminishing of a capacitance difference among the plurality of first and second drawing wiring lines and to enable improvement of detection accuracy for the electrostatic capacitance type touch panel.

7. A screen input display device, comprising:

a display device; and

an electrostatic capacitance type touch panel disposed on at least a display area of the display device, wherein;

the electrostatic capacitance type touch panel comprises;

a substrate;

a plurality of first electrodes disposed in parallel on the substrate;

an insulating film formed so as to cover the plurality of first electrodes;

a plurality of second electrodes disposed in parallel to intersect the plurality of first electrodes on the insulating film;

a plurality of first drawing wiring lines connected to the plurality of first electrodes to be drawn to a connection terminal; and

a plurality of second drawing wiring lines connected to the plurality of second electrodes to be drawn to the connection terminal, wherein

the plurality of first or second drawing wiring lines have different lengths, the plurality of first or second drawing wiring lines have different widths in accordance with a length thereof so that a width of a shortest length of the plurality of first or second drawing wiring lines is the widest width and a width of a longest length of the first or second drawing wiring lines is the narrowest width, and the plurality of first and second drawing wiring lines have different intervals between adjacent two of the plurality of first or second drawing wiring lines as the lengths are longer so that the interval between the adjacent two of the plurality of first or second drawing wiring lines having the longest lengths is largest and the interval between the adjacent two of the plurality of first or second drawing wiring lines having the shortest lengths is smallest.

8. A screen input display device according to claim 7, wherein each of the plurality of first electrodes and the plurality of second electrodes is formed so that pad portions and thin line portions thinner than the pad portions are alternately arrayed in an extending direction of the each of the plurality of first electrodes and the plurality of second electrodes, and in plan view, the pad portions of the plurality of first electrodes and the pad portions of the plurality of second electrodes are arranged so as not to overlap each other.

9. A screen input display device according to claim 7, wherein:

the plurality of first electrodes comprise a transparent conductive layer;

the plurality of first drawing wiring lines are formed into a two-layer structure including a transparent conductive layer and a metal layer;

the plurality of second electrodes comprise a transparent conductive layer; and

the plurality of second drawing wiring lines are formed into a two-layer structure including a transparent conductive layer and a metal layer.

15. A screen input display device according to claim 7, wherein the plurality of first or second drawing lines include at least three first or second drawing lines extending with different lengths from one another from an end of one of a column and row of the first and second electrodes to the connection terminal, adjacent ones of the first or second drawing lines having different lengths which increase in length from one another in one of a first and second direction with respect to the connector and having widths different from one another which decrease in width from one another in the one of the first and second direction, and intervals between each adjacent two of the at least three of the first or second drawing lines which increase from one another in the one of the first and second direction in which the lengths of the adjacent ones of the first and second drawing lines increase in length from the other.

19. A screen input display device according to claim 7, wherein each of the first and second drawing wiring lines is a continuous conductive non-segmented drawing wiring line having a different length and a different width with respect to an adjacent drawing wiring line, and different intervals with respect to adjacent drawing wiring lines sufficient to enable diminishing of a capacitance difference among the plurality of first and second drawing wiring lines and to enable improvement of detection accuracy for the electrostatic capacitance type touch panel.

10. A screen input display device, comprising:

a display device; and

an electrostatic capacitance type touch panel disposed in at least a display area of the display device, wherein;

the electrostatic capacitance type touch panel comprises;

a substrate;

a plurality of first electrodes disposed in parallel on the substrate;

an insulating film formed so as to cover the plurality of first electrodes;

a plurality of second electrodes disposed in parallel to intersect the plurality of first electrodes on the insulating film;

a plurality of first drawing wiring lines connected to the plurality of first electrodes to be drawn to a connection terminal; and

a plurality of second drawing wiring lines connected to the plurality of second electrodes to be drawn to the connection terminal, wherein

the plurality of first drawing wiring lines have different lengths, the plurality of first drawing lines have larger widths as the lengths are shorter so that the first drawing wiring line having a shortest length has a widest width and the first drawing wiring line having a longest length has a narrowest width, and the plurality of first drawing wiring lines have different intervals between adjacent two of the plurality of first drawing wiring lines as the lengths are longer so that the interval between the adjacent two first drawing wiring lines of the longest length is largest and the interval between the adjacent two first drawing wiring lines of the shortest lengths is narrowest; and

the plurality of second drawing wiring lines have different lengths, the plurality of second drawing lines have larger widths as the lengths are shorter so that the second drawing wiring line having a shortest length has a widest width and the second drawing wiring line having a longest length has a narrowest width, and the plurality of second drawing wiring lines have different intervals between adjacent two of the plurality of second drawing wiring lines as the lengths are longer so that the interval between the adjacent two second drawing wiring lines of the longest length is largest and the interval between the adjacent two second drawing wiring lines of the shortest lengths is narrowest.

11. A screen input display device according to claim 10, wherein each of the plurality of first electrodes and the plurality of second electrodes is formed so that pad portions and thin line portions thinner than the pad portions are alternately arrayed in an extending direction of the each of the plurality of first electrodes and the plurality of second electrodes, and in plan view, the pad portions of the plurality of first electrodes and the pad portions of the plurality of second electrodes are arranged so as not to overlap each other.

12. A screen input display device according to claim 10, wherein:

the plurality of first electrodes comprise a transparent conductive layer;

the plurality of first drawing wiring lines are formed into a two-layer structure including a transparent conductive layer and a metal layer;

the plurality of second electrodes comprise a transparent conductive layer; and

the plurality of second drawing wiring lines are formed into a two-layer structure including a transparent conductive layer and a metal layer.

16. A screen input display device according to claim 10, wherein the plurality of first drawing lines include at least three first drawing lines extending with different lengths from one another from an end of one of a column and row of the first electrodes to the connection terminal, adjacent ones of the first drawing lines having different lengths which increase in length from one another in a first direction with respect to the connection terminal and having widths different from one another which decrease in width from one another in the first direction, and intervals between adjacent two of the at least three of the first drawing lines which increase from one another in the first direction in which the lengths of the adjacent ones of the first drawing lines increase in length from one another, and wherein the plurality of second drawing lines include at least three second drawing lines extending with different lengths from one another from an end of another of the column and row of the second electrodes to the connection terminal, adjacent ones of the second drawing lines having different lengths which increase in length from one another in a second direction opposite to the first direction with respect to the connection terminal and having widths different from one another which decrease in width from one another in the second direction, and intervals between each adjacent two of the at least three of the second drawing lines which increase from one another in the second direction in which the lengths of the adjacent ones of the second drawing lines increase in length from one another.

20. A screen input display device according to claim 10, wherein each of the first and second drawing wiring lines is a continuous conductive non-segmented drawing wiring line having a length and width with respect to an adjacent drawing wiring line and an interval therebetween so as to diminish a capacitance difference among the plurality of first and second drawing wiring lines and improve detection accuracy for the electrostatic capacitance type touch panel.