TOUCH DETECTION DEVICE, DISPLAY DEVICE WITH TOUCH DETECTING FUNCTION, AND ELECTRONIC APPARATUS

• US 20140192018A1
• Filed: 01/08/2014
• Published: 07/10/2014
• Est. Priority Date: 01/10/2013
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Kurasawa, Hayato, Teranishi, Yasuyuki, Kida, Yoshitoshi
• Granted Patent: US 10,095,359 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• 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

According to an aspect, a touch detection device includes a drive electrode layer including a plurality of drive electrodes formed in stripes in an array direction; a plurality of touch detection electrodes that are arranged in a manner facing the plurality of drive electrodes and generate capacitance with the plurality of drive electrodes; and a touch detecting unit that applies a touch drive signal to the plurality of drive electrodes and detects a position of an object in contiguity with a touch detection area based on detection signals supplied from the plurality of touch detection electrodes. The plurality of the drive electrodes include an end drive electrode that is provided to at least one end in the array direction and has a larger width in the array direction than the width in the array direction of drive electrodes other than the end drive electrode.

Claims

1. A touch detection device comprising:

a drive electrode layer including a plurality of drive electrodes formed in stripes in an array direction;

a plurality of touch detection electrodes that are arranged in a manner facing the plurality of drive electrodes and generate capacitance with the plurality of drive electrodes; and

a touch detecting unit that applies a touch drive signal to the plurality of drive electrodes and detects a position of an object in contiguity with a touch detection area provided with the plurality of drive electrodes and the plurality of touch detection electrodes based on detection signals supplied from the plurality of touch detection electrodes, wherein

the plurality of the drive electrodes of the drive electrode layer include an end drive electrode that is provided to at least one end in the array direction and has a larger width in the array direction than the width in the array direction of drive electrodes other than the end drive electrode.

2. The touch detection device according to claim 1, wherein, the plurality of drive electrodes in the drive electrode layer are arranged symmetrically with respect to center in the array direction.

3. A display device with a touch detecting function having a touch detection device and a display device arranged in a manner overlapping with the touch detection device, the touch detection device comprising:

a drive electrode layer including a plurality of drive electrodes formed in stripes in an array direction;

a plurality of touch detection electrodes that are arranged in a manner facing the plurality of drive electrodes and generate capacitance with the plurality of drive electrodes; and

a touch detecting unit that applies a touch drive signal to the plurality of drive electrodes and detects a position of an object in contiguity with a touch detection area provided with the plurality of drive electrodes and the plurality of touch detection electrodes based on detection signals supplied from the plurality of touch detection electrodes, wherein

the plurality of the drive electrodes of the drive electrode layer include an end drive electrode that is provided to at least one end in the array direction and has a larger width in the array direction than the width in the array direction of drive electrodes other than the end drive electrode.

4. The display device with a touch detecting function according to claim 3, wherein

the display device comprises:

a plurality of pixel electrodes arranged on a substrate in a manner facing the drive electrode layer of the touch detection device;

a display functional layer that is laminated on the plurality of pixel electrodes and has an image display function to display an image; and

a control unit that applies a display drive voltage between the plurality of pixel electrodes and the plurality of drive electrodes based on an image signal and performs image display control such that the display functional layer performs the image display function.

5. The display device with a touch detecting function according to claim 3, wherein, the end drive electrode in the drive electrode layer is larger than the drive electrodes other than the end drive electrode in the array direction by an integral multiple of a pixel pitch that is an arrangement interval between the plurality of pixel electrodes in a display area.

6. The display device with a touch detecting function according to claim 3, wherein a part of the end drive electrode is arranged outside of the display area in the array direction.

7. An electronic apparatus having the display device with a touch detecting function that has a touch detection device and a display device arranged in a manner overlapping with the touch detection device, the touch detection device comprising:

a drive electrode layer including a plurality of drive electrodes formed in stripes in an array direction;

a plurality of touch detection electrodes that are arranged in a manner facing the plurality of drive electrodes and generate capacitance with the plurality of drive electrodes; and

a touch detecting unit that applies a touch drive signal to the plurality of drive electrodes and detects a position of an object in contiguity with a touch detection area provided with the plurality of drive electrodes and the plurality of touch detection electrodes based on detection signals supplied from the plurality of touch detection electrodes, wherein

the plurality of the drive electrodes of the drive electrode layer include an end drive electrode that is provided to at least one end in the array direction and has a larger width in the array direction than the width in the array direction of drive electrodes other than the end drive electrode.