Display apparatus with touch detection functions and with driving electrodes shared by two more pixels in the same column, driving method for same, and mobile device with same

• US 10,514,810 B2
• Filed: 04/29/2019
• Issued: 12/24/2019
• Est. Priority Date: 04/28/2010
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Noguchi, Koji, Kida, Yoshitoshi
• Primary Examiner(s): Landis, Lisa S
• Application Number:
  US16/397,397
• Publication Number:
  US 20190250743A1
• Time in Patent Office: 239 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• 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

A display apparatus with a substrate having a long side and a short side, a plurality of driving electrodes arranged on the substrate parallel to the long side of the substrate, a plurality of touch detection electrodes arranged on the substrate parallel to the short side of the substrate, a control unit electrically coupled to each of the plurality of driving electrodes and which sequentially drives the plurality of driving electrodes, and a detection unit electrically coupled to each of the touch detection electrodes.

Claims

1. A display apparatus comprising:

a first substrate;

a second substrate facing the first substrate;

a plurality of pixel electrodes arranged in columns and rows above the first substrate, the columns extending along a first direction and the rows extending along a second direction that is orthogonal to the first direction;

a plurality of common electrodes on the first substrate, each of the common electrodes overlapping widthwise two or more of the pixel electrodes;

an insulating layer between the pixel electrodes and the common electrodes;

a plurality of pixel signal lines extending in the first direction;

a source driver that supplies a pixel signal to each of the pixel electrodes through a corresponding one of the pixel signal lines; and

a common electrode driver electrically coupled to each of the common electrodes,

wherein,

in a display period, the common electrode driver applies a constant voltage to all of the common electrodes and the source driver transmits a respective pixel signal to each of the pixel signal lines to display an image, and

in a touch period that is different from the display period, the source driver supplies a pulse signal to one of the pixel signal lines and the common electrode driver makes a potential of a corresponding one of the common electrodes be in a state synchronized with the pulse signal.

2. The display according to claim 1, wherein, in the touch period, the common electrode driver transmits a touch signal to the one of the pixel signal lines after making the corresponding one of the common electrodes in the state, thereby propagating the touch signal to the corresponding common electrode via capacitive coupling between the pixel signal line and the corresponding common electrode.

3. The display apparatus according to claim 1, wherein:

in the display period, the pixel electrodes are sequentially scanned in the first direction, and

in the touch period, the common electrodes are scanned in a direction other than the first direction.

4. The display apparatus according to claim 3, wherein:

the display apparatus has a long side and a short side,

in the display period, the common electrode driver scans each of a plurality of units to be driven along the long side of the display apparatus, and

in the touch period, the common electrode driver scans each of a plurality of units to be driven along the short side of the display apparatus.

5. The display apparatus according to claim 1, further comprising a liquid crystal layer between the first substrate and the second substrate.