TOUCH PANEL

• US 20120327017A1
• Filed: 06/20/2012
• Published: 12/27/2012
• Est. Priority Date: 06/24/2011
• Status: Active Grant

• Current Assignee: Fujitsu Component Limited (Fujitsu Limited)
• Original Assignee: Fujitsu Component Limited (Fujitsu Limited)
• Inventors: Sekizawa, Mitsuhiro
• Granted Patent: US 9,195,359 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04113 Peripheral electrode pattern in resistive digitisers, i.e. electrodes at the periphery of the resistive sheet are shaped in patterns enhancing linearity of induced field
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A touch panel includes first and second electrode substrates including first and second conductive layers; a first electrode and a second electrode provided on the first conductive layer for causing an electric potential distribution; a third electrode and a fourth electrode provided on the first conductive layer for causing an electric potential distribution such that the first electrode and the second electrode are electrically connected by the third electrode and the fourth electrode; and a resistance adjusting member including a first resistance portion and a second resistance portion electrically connected to the first electrode and the second electrode in parallel, respectively, and configured such that resistance values of the first resistance portion and the second resistance portion become lower at the center than at the outer sides in the longitudinal direction of the first electrode and the second electrode, respectively.

Claims

1. A touch panel comprising:

a first electrode substrate including a first substrate and a first conductive layer formed on the first substrate;

a second electrode substrate including a second substrate and a second conductive layer formed on the second substrate to face the first conductive layer;

a first electrode and a second electrode provided to be parallel to each other on the first conductive layer for causing an electric potential distribution;

a third electrode and a fourth electrode provided to be parallel to each other on the first conductive layer for causing an electric potential distribution such that the first electrode and the second electrode are electrically connected by the third electrode and the fourth electrode to form a rectangular ring shape; and

a resistance adjusting member including a first resistance portion and a second resistance portion electrically connected to the first electrode and the second electrode in parallel, respectively, and configured such that resistance values of the first resistance portion and the second resistance portion become lower at the center than at the outer sides in the longitudinal direction of the first electrode and the second electrode, respectively.

2. The touch panel according to claim 1,

wherein the resistance adjusting member further includes a third resistance portion and a fourth resistance portion electrically connected to the third electrode and the fourth electrode in parallel, respectively, and configured such that resistance values of the third resistance portion and the fourth resistance portion become lower at the center than at the outer sides in the longitudinal direction of the third electrode and the fourth electrode, respectively.

3. The touch panel according to claim 1,

wherein the first resistance portion and the second resistance portion are formed on the first conductive layer along the first electrode and the second electrode, respectively.

4. The touch panel according to claim 1,

wherein the first resistance portion and the second resistance portion are positioned at outsides of the first electrode and the second electrode, respectively.

5. The touch panel according to claim 1,

wherein the first resistance portion and the second resistance portion are positioned at insides of the first electrode and the second electrode, respectively.

6. The touch panel according to claim 1,

wherein the first resistance portion and the second resistance portion are formed on the first electrode and the second electrode.

7. The touch panel according to claim 1,

wherein the first resistance portion is formed to have a width wider at a center and smaller at outer sides in the longitudinal direction of the first electrode portion, and

the second resistance portion is formed to have a width wider at a center and smaller at outer sides in the longitudinal direction of the second electrode portion.

8. The touch panel according to claim 1,

wherein the first resistance portion includes plural resistance portions which are provided along the first electrode such that a length of the resistance portions are set as the closer to the center in the longitudinal direction of the first electrode, the longer the length of the resistance portion becomes, and

the second resistance portion includes plural resistance portions which are provided along the second electrode such that a length of the resistance portions are set as the closer to the center in the longitudinal direction of the second electrode, the longer the length of the resistance portion becomes.

9. The touch panel according to claim 1,

wherein the first resistance portion includes plural resistance portions which are provided along the first electrode such that the plural resistance portions are densely arranged at the center and sparsely arranged at the outer sides in the longitudinal direction of the first electrode, and

the second resistance portion includes plural resistance portions which are provided along the second electrode such that the plural resistance portions are densely arranged at the center and sparsely arranged at the outer sides in the longitudinal direction of the second electrode.

10. The touch panel according to claim 1,

wherein the resistance values of the first resistance portion and the second resistance portion are lower than the resistance values of the first electrode and the second electrode, respectively.

11. A touch panel comprising:

a first electrode substrate including a first substrate and a first conductive layer formed on the first substrate;

a second electrode substrate including a second substrate and a second conductive layer formed on the second substrate to face the first conductive layer;

a first electrode and a second electrode provided to be parallel to each other on the first conductive layer for causing an electric potential distribution; and

a resistance adjusting member including a first resistance portion and a second resistance portion electrically connected to the first electrode and the second electrode in parallel, respectively, and configured such that resistance values of the first resistance portion and the second resistance portion become lower at the center than at the outer sides in the longitudinal direction of the first electrode and the second electrode, respectively.