Touch panel and display device
Provided is an electrostatic capacitance type touch panel, wherein lead lines are connected to respective end portions of at least either one of the X electrodes and the Y electrodes respectively, the touch panel further comprises an inspection electrode which is laminated to respective end portions of the at least either one of the X electrodes and the Y electrodes with an insulation film sandwiched therebetween on a side where the lead lines are not connected to the at least either one of the X electrodes and the Y electrodes, and a voltage for inspection is supplied to the inspection electrode during an inspection time and a voltage at the same phase as the drive voltage supplied to the at least either one of the X electrodes and the Y electrodes is supplied to the inspection electrode during a usual operation time.
1. An electrostatic capacitance type touch panel comprising:
a substrate;
a plurality of X electrodes which are formed over the substrate, the plurality of X electrodes extending in a second direction and being arranged in a first direction which intersects with the second direction; and
a plurality of Y electrodes which are formed over the substrate, the plurality of Y electrodes extending in the first direction while intersecting with the X electrodes and being arranged in the second direction;
a drive voltage being supplied to the plurality of Y electrodes from one side of the plurality of Y electrodes, wherein lead lines are connected to respective one-end portions of the Y electrodes,
the Y electrodes being divided into a first group and a second group, and the lead lines which are connected to the respective one-end portions of the Y electrodes in the first group and the lead lines which are connected to the respective one-end portions of the Y electrodes in the second group are led out in directions different from each other so an effective touch region can be set uniform between a left side and a right side of the electrostatic capacitance type touch panel,
the Y electrodes being placed inside the effective touch region, the first and second groups having extended inspection portions outside the effective touch region at respective other-end portions where the lead lines are not connected for inspecting electrical connections of the Y electrodes respectively,
the touch panel further comprises outside the effective touch region a single continuous first inspection electrode which is laminated to and faces respective ones of the inspection portions in the first group with an insulation film sandwiched therebetween, and outside the effective touch region a single continuous second inspection electrode which is laminated to and faces respective ones of the inspection portions in the second group with an insulation film sandwiched therebetween, and
a voltage for inspection is supplied to the first inspection electrode and the second inspection electrode and detected through the lead lines during an inspection time and a voltage at the same phase as the drive voltage supplied to the Y electrodes is supplied to the first inspection electrode and the second inspection electrode during a usual operation time.
2. The touch panel according to claim 1 , wherein the respective X electrodes and the respective Y electrodes are formed by alternately arranging pad portions and fine line portions in an extending direction thereof respectively,
the pad portions of the respective X electrodes and the pad portions of the respective Y electrodes are arranged without overlapping with each other as viewed in a plan view, and the fine line portions of the respective X electrodes and the fine line portions of the respective Y electrodes intersect with each other three-dimensionally,
the pad portions and the fine line portions of the respective X electrodes and the pad portions of the respective Y electrodes are formed over the same layer,
the fine line portions of the respective Y electrodes are formed below the pad portions of the respective Y electrodes, and are connected to the pad portions of the respective Y electrodes via contact holes formed in an insulation film interposed between the pad portions of the respective Y electrodes and the fine line portions of the respective Y electrodes, and
the first inspection electrode and the second inspection electrode are formed over the same layer over which the fine line portions of the Y electrodes are formed.
3. The touch panel according to claim 1 , wherein the respective X electrodes and the respective Y electrodes are formed by alternately arranging pad portions and fine line portions in an extending direction thereof respectively,
the pad portions of the respective X electrodes and the pad portions of the respective Y electrodes are arranged without overlapping with each other as viewed in a plan view, and the fine line portions of the respective X electrodes and the fine line portions of the respective Y electrodes intersect with each other three-dimensionally,
the pad portions and the fine line portions of the respective X electrodes and the pad portions of the respective Y electrodes are formed over the same layer,
the fine line portions of the respective Y electrodes are formed above the pad portions of the respective Y electrodes, and are connected to the pad portions of the respective Y electrodes via contact holes formed in an insulation film interposed between the pad portions of the respective Y electrodes and the fine line portions of the respective Y electrodes, and
the first inspection electrode and the second inspection electrode are formed over the same layer over which the fine line portions of the Y electrodes are formed.
4. The touch panel according to claim 1 , wherein the respective X electrodes and the respective Y electrodes are formed by alternately arranging pad portions and fine line portions in an extending direction thereof respectively,
the pad portions of the respective X electrodes and the pad portions of the respective Y electrodes are arranged without overlapping with each other as viewed in a plan view, and the fine line portions of the respective X electrodes and the fine line portions of the respective Y electrodes intersect with each other three-dimensionally,
the X electrodes and the Y electrodes are formed over different layers with an insulation film sandwiched therebetween, and the X electrodes are formed below the Y electrodes, and
the first inspection electrode and the second inspection electrode are formed between the layer over which the Y electrodes are formed and the layer over which the X electrodes are formed.
5. A display device comprising:
a display panel; and
a touch panel which is arranged on a viewer's side of the display panel, wherein
the touch panel is the touch panel according to claim 1 .