Touch panel and touch panel integrated display device

• US 9,690,418 B2
• Filed: 09/13/2013
• Issued: 06/27/2017
• Est. Priority Date: 09/14/2012
• 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: Sugita, Yasuhiro, Kida, Kazutoshi
• Primary Examiner(s): Sasinowski, Andrew
• Assistant Examiner(s): Lin, Chun-Nan
• Application Number:
  US14/427,064
• Publication Number:
  US 20150242041A1
• Time in Patent Office: 1,383 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• 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
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors

Abstract

An electrostatic capacitive touch panel having a large surface area includes (i) a driving electrode group (220) and a sensing electrode group (130) which are provided on a substrate (210), and (ii) a touch panel driving circuit (250) provided in a frame region adjacent to a touch panel region where the driving electrode group (220) and the sensing electrode group (130) are provided. The touch panel driving circuit (250) is made up of TFTs made of an oxide semiconductor having a wide band gap so that the touch panel driving circuit (250) has a small surface area. This allows the touch panel to have a narrow frame.

Claims

1. A touch panel comprising:

a substrate;

sensing electrodes and driving electrodes, each of the sensing electrodes and the driving electrodes providing detection of a touched position;

a touch panel driving circuit that drives the driving electrodes; and

a touched position detecting circuit that detects the touched position upon receipt of a detection output from the sensing electrodes, wherein

the touch panel driving circuit includes a plurality of thin-film transistors of an oxide semiconductor,

the touch panel driving circuit is in a frame region adjacent to a touch electrode region in which the sensing electrodes and the driving electrodes are located, and

the sensing electrodes, the driving electrodes, and the touch panel driving circuit are on a same surface of the substrate, wherein

the touch panel driving circuit is a sequential driving circuit which sequentially drives the driving electrodes, and

the touch panel driving circuit carries out time-sharing driving in synchronization with a horizontal synchronization signal of a display device to be integrated with the touch panel, the touch panel driving circuit driving the touch panel during a period other than an initial charging period during which a source line of each of sub pixels of the display device is charged.

2. A touch panel integrated display device comprising a touch panel recited in claim 1.

3. A touch panel comprising:

a substrate;

sensing electrodes and driving electrodes, each of the sensing electrodes and the driving electrodes providing detection of a touched position;

a touch panel driving circuit that drives the driving electrodes; and

a touched position detecting circuit that detects the touched position upon receipt of a detection output from the sensing electrodes, wherein

the touch panel driving circuit includes a plurality of thin-film transistors of an oxide semiconductor,

the touch panel driving circuit is in a frame region adjacent to a touch electrode region in which the sensing electrodes and the driving electrodes are located, and

the sensing electrodes, the driving electrodes, and the touch panel driving circuit are on a same surface of the substrate, wherein

the touch panel driving circuit is a sequential driving circuit which sequentially drives the driving electrodes, and

the touch panel driving circuit carries out time-sharing driving in synchronization with a horizontal synchronization signal of a display device to be integrated with the touch panel, the touch panel driving circuit driving the touch panel during a period overlapping with an initial charging period during which (i) a source line of each of sub pixels of the display device is charged and (ii) radiant noise is present.

4. A touch panel integrated display device comprising a touch panel recited in claim 3.

5. A touch panel comprising:

a substrate;

sensing electrodes and driving electrodes, each of the sensing electrodes and the driving electrodes providing detection of a touched position;

a touch panel driving circuit that drives the driving electrodes; and

a touched position detecting circuit that detects the touched position upon receipt of a detection output from the sensing electrodes, wherein

the touch panel driving circuit includes a plurality of thin-film transistors of an oxide semiconductor,

the touch panel driving circuit is in a frame region adjacent to a touch electrode region in which the sensing electrodes and the driving electrodes are located, and

the sensing electrodes, the driving electrodes, and the touch panel driving circuit are on a same surface of the substrate, wherein

the touch panel driving circuit is a parallel driving circuit which drives the driving electrodes in parallel, and

the touch panel driving circuit carries out time-sharing driving in synchronization with a horizontal synchronization signal of a display device to be integrated with the touch panel, the touch panel driving circuit driving the touch panel during a period other than an initial charging period during which a source line of each of sub pixels of the display device is charged.

6. A touch panel integrated display device comprising a touch panel recited in claim 5.

7. A touch panel comprising:

a substrate;

sensing electrodes and driving electrodes, each of the sensing electrodes and the driving electrodes providing detection of a touched position;

a touch panel driving circuit that drives the driving electrodes; and

a touched position detecting circuit that detects the touched position upon receipt of a detection output from the sensing electrodes, wherein

the touch panel driving circuit includes a plurality of thin-film transistors of an oxide semiconductor,

the touch panel driving circuit is in a frame region adjacent to a touch electrode region in which the sensing electrodes and the driving electrodes are located, and

the sensing electrodes, the driving electrodes, and the touch panel driving circuit are on a same surface of the substrate, wherein

the touch panel driving circuit is a parallel driving circuit which drives the driving electrodes in parallel, and

the touch panel driving circuit carries out time-sharing driving in synchronization with a horizontal synchronization signal of a display device to be integrated with the touch panel, the touch panel driving circuit driving the touch panel during a period overlapping with an initial charging period during which (i) a source line of each of sub pixels of the display device is charged and (ii) radiant noise is present.

8. A touch panel integrated display device comprising a touch panel recited in claim 7.