TOUCH PANEL SUBSTRATE AND DISPLAY DEVICE

• US 20150212622A1
• Filed: 07/24/2013
• Published: 07/30/2015
• Est. Priority Date: 07/31/2012
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Hirata, Mitsuaki, Matsumoto, Shinji
• Granted Patent: US 9,459,744 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 1/16 Constructional details or arrangements
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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

A touch panel substrate used for a touch panel with enhanced display quality is realized. A touch panel substrate (2) in accordance with one aspect of the invention includes a first detection electrode (11) including a plurality of first lattice electrodes (13) aligned in a lateral direction. Each of the plurality of first lattice electrodes (13) includes conductive lines (17a) and second conductive lines (17b). The conductive lines (17a) and the second conductive lines (17b) form a lattice. The conductive lines (17a) are inclined by an angle α (0°<α<45°) in a lateral direction. A pitch of conductive lines (21) of a connecting section (16) which are parallel to the conductive lines (17a) is smaller than a pitch of the conductive lines (17a).

Claims

1. A touch panel substrate, comprising:

a first detection electrode including a plurality of first lattice electrodes aligned in a first direction; and

a second detection electrode including a plurality of second lattice electrodes aligned in a second direction different from the first direction,

in a plan view, the plurality of first lattice electrodes being provided in regions different from regions where the plurality of second lattice electrodes are provided,

the plurality of first lattice electrodes each including a plurality of first conductive lines parallel to a third direction and a plurality of second conductive lines parallel to a fourth direction different from the third direction,

the plurality of first conductive lines and the plurality of second conductive lines forming a lattice,

the third direction being inclined to the first direction at an angle of α

that is larger than 0° and

smaller than 45°

,

the plurality of second lattice electrodes each including a plurality of third conductive lines parallel to the third direction and a plurality of fourth conductive lines parallel to the fourth direction,

the plurality of third conductive lines and the plurality of fourth conductive lines forming a lattice,

adjacent ones of the plurality of first lattice electrodes in the first direction being electrically connected with each other via a first connecting section positioned between the adjacent ones of the plurality of first lattice electrodes,

the first connecting section including a plurality of fifth conductive lines parallel to the third direction,

the plurality of fifth conductive lines having a pitch that is smaller than a pitch of the plurality of first conductive lines,

adjacent ones of the plurality of second lattice electrodes in the second direction being electrically connected with each other via a second connecting section positioned between the adjacent ones of the plurality of second lattice electrodes,

the second connecting section including a plurality of sixth conductive lines parallel to the fourth direction, and

the plurality of sixth conductive lines having a pitch that is smaller than a pitch of the plurality of fourth conductive lines.

2. The touch panel substrate as set forth in claim 1, wherein

the pitch of the plurality of first conductive lines, a pitch of the plurality of second conductive lines, a pitch of the plurality of third conductive lines, and the pitch of the plurality of fourth conductive lines are equal to one another, and

the pitch of the plurality of fifth conductive lines and the pitch of the plurality of sixth conductive lines are equal to each other.

3. The touch panel substrate as set forth in claim 1, wherein

the plurality of first conductive lines of each of the plurality of first lattice electrodes are not aligned with the plurality of third conductive lines of one of the plurality of second lattice electrodes which one is adjacent in the third direction to said each of the plurality of first lattice electrodes, and

the plurality of second conductive lines of each of the plurality of first lattice electrodes are not aligned with the plurality of fourth conductive lines of one of the plurality of second lattice electrodes which one is adjacent in the fourth direction to said each of the plurality of first lattice electrodes.

4. The touch panel substrate as set forth in claim 1, wherein 45°

-arctan(½

)<

α

<

45°

.

5. The touch panel substrate as set forth in claim 1, wherein 45°

-arctan(⅙

)≦

α

≦

45°

-arctan(⅛

).

6. The touch panel substrate as set forth in claim 1, wherein

the pitch of the plurality of fifth conductive lines is larger than a half of the pitch of the plurality of first conductive lines, and

the pitch of the plurality of sixth conductive lines is larger than a half of the pitch of the plurality of fourth conductive lines.

7. The touch panel substrate as set forth in claim 1, wherein

the plurality of first lattice electrodes each further include a plurality of seventh conductive lines parallel to the third direction, and

the plurality of seventh conductive lines are provided at a pitch equal to the pitch of the plurality of fifth conductive lines and are aligned with the plurality of fifth conductive lines.

8. The touch panel substrate as set forth in claim 1, wherein

the first connecting section further includes an eighth conductive line which overlaps one of the plurality of fourth conductive lines or one of the plurality of sixth conductive lines in a plan view, and

the eighth conductive line connects one of the plurality of first conductive lines with one of the plurality of fifth conductive lines, said one of the plurality of first conductive lines and said one of the plurality of fifth conductive lines being not aligned with each other.

9. The touch panel substrate as set forth in claim 1, wherein the first direction and the second direction are orthogonal to each other.

10. The touch panel substrate as set forth in claim 9, wherein the third direction and the fourth direction are orthogonal to each other.

11. The touch panel substrate as set forth in claim 1, wherein the plurality of first lattice electrodes and the plurality of second lattice electrodes each have a square shape.

12. The touch panel substrate as set forth in claim 1, wherein

the first detection electrode and the first connecting section are provided in a first layer, and

the second detection electrode and the second connecting section are provided in a second layer different from the first layer.

13. A display device, comprising:

a touch panel substrate as set forth in claim 1; and

a display panel.

14. The display device as set forth in claim 13, wherein a lattice of a black matrix provided in the display panel includes (i) strips extending in one direction parallel to the first direction and (ii) strips extending in another direction parallel to the second direction.