ELECTRICAL CAPACITANCE INPUT DEVICE, DISPLAY APPARATUS WITH INPUT FUNCTION AND ELECTRONIC APPARATUS

• US 20090244021A1
• Filed: 02/24/2009
• Published: 10/01/2009
• Est. Priority Date: 03/26/2008
• Status: Active Grant

• Current Assignee: Japan Display West Incorporated (Japan Display Incorporated)
• Original Assignee: Epson Imaging Devices Corporation (Seiko Group)
• Inventors: KOBAYASHI, Yasuhiro, MATSUO, Mutsumi
• Granted Patent: US 8,531,409 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• 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 3/0443 using a single layer of sensing electrodes
• 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 input device having a plurality of first electrodes extending in a first direction and a plurality of second electrodes extending in a second direction intersecting the first direction in an input area, including a plurality of first lines extending in parallel to each other from the plurality of first electrodes to a plurality of first terminals, and a plurality of second lines extending in parallel to each other from the plurality of second electrode to a plurality of second terminals, the first lines and the second lines being formed outside the input area, and an auxiliary line extending outside at least one of the lines at both ends in terms of the direction of arrangement of one or both of the plurality of first lines and the plurality of second lines, the auxiliary line generating a parasitic capacitance with respect to the at least one of the lines.

Claims

1. An electrostatic capacitance input device having a plurality of first electrodes extending in a first direction and a plurality of second electrodes extending in a second direction intersecting the first direction in an input area, comprising:

a plurality of first lines extending in parallel to each other from the plurality of first electrodes to a plurality of first terminals, and

a plurality of second lines extending in parallel to each other from the plurality of second electrode to a plurality of second terminals,

the first lines and the second lines being formed outside the input area, and

an auxiliary line extending outside at least one of the lines at both ends in terms of the direction of arrangement of one or both of the plurality of first lines and the plurality of second lines, the auxiliary line generating a parasitic capacitance with respect to the at least one of the lines.

2. The electrostatic capacitance input apparatus according to claim 1, wherein one or both of the plurality of first lines and the plurality of second lines include one line and lines being arranged on both sides of the one line and being different in terms of the length of a portion which extends in parallel to the one line, and the distance from the one line is wider on the side of the line being longer in terms of the length of the portion which extends in parallel to the one line than on the side of the line being shorter in terms of the length of the portion which extends in parallel to the one line.

3. The electrostatic capacitance input apparatus according to claim 1, wherein one or both of the plurality of first lines and the plurality of second line include lines being different in terms of the length, and the width of the lines having a long distribution length is at least partly wider than the lines having a short distribution length.

4. The electrostatic capacitance input apparatus according to claim 1, wherein the auxiliary line includes a first auxiliary line and a second auxiliary line arranged outsides the lines at the both ends of one or both of the plurality of first lines and the plurality of second lines in terms of the direction of arrangement thereof, and the first auxiliary line and the second auxiliary line generate the parasitic capacitances with respect to the lines at both ends respectively.

5. The electrostatic capacitance input device according to claim 1, wherein the plurality of first line extend from one of the ends of the plurality of first electrodes in the input area to the plurality of first terminals so as to extend along an end side of the input area,

the auxiliary line includes a first auxiliary line and a second auxiliary line arranged outsides the lines at the both ends of the plurality of first lines in terms of the direction of arrangement thereof, and the first auxiliary line and the second auxiliary line generate the parasitic capacitances with respect to the lines at the both ends respectively.

6. The electrostatic capacitance input device according to claim 4, wherein the first auxiliary line constitutes a shield line which surrounds the input area on the outer peripheral side.

7. The electrostatic capacitance input device according to claim 1, wherein the plurality of second lines extends from the both ends of the plurality of second electrodes in the display area to the plurality of second terminals,

the plurality of second lines extending from the one of the both ends of the plurality of second electrodes has a different length from the plurality of second lines extending from the other ends,

the auxiliary line extends at least outside the line located on the opposite side from the input area from between the lines arranged at both ends of the plurality of longer second lines in terms of the direction of arrangement of the lines.

9. A display apparatus with an input function comprising the electrostatic capacitance input device according to claim 1, wherein an image forming apparatus is overlapped on the opposite side from an input surface in the electrostatic capacitance input device.

10. An electronic apparatus comprising the display apparatus with an input function according to claim 9.

8. An electrostatic capacitance having a plurality of first electrodes extending in a first direction and a plurality of second electrodes extending in a second direction intersecting the first direction comprising:

a plurality of first lines extending in parallel to each other from the plurality of first electrodes to a plurality of first terminals, and

a plurality of second lines extending in parallel to each other from the plurality of second electrode to a plurality of second terminals,

the first lines and the second lines being formed outside the input area, and

one or both of the plurality of first lines and the plurality of second lines include one line and lines being arranged on both sides of the one line and being different in terms of the length of a portion which extends in parallel to the one line, and the distance from the one line is wider on the side of the line being longer in terms of the length of the portion which extends in parallel to the one line than on the side of the line being shorter in terms of the length of the portion which extends in parallel to the one line.