Touch display substrate, touch display panel and touch display apparatus

Patent metadata

Field	Value
Publication number	US-9977538-B2
Application number	US-201515125858-A
Country	US
Kind code	B2
Filing date	Aug 14, 2015
Priority date	Dec 23, 2014
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

A touch display panel is provided. The touch display panel includes a plurality of touch driving electrodes and a plurality of touch sensing electrodes intersecting with and electrically insulated from the plurality of the touch driving electrodes. An individual touch driving electrode of the plurality of touch driving electrodes has an outer contour and an inner contour, the inner contour at least partially defining an area allowing a common electrode to be disposed therein, and an area of the individual touch driving electrode is substantially less than that defined by the outer contour.

First claim

What is claimed is:

1. A touch display panel, comprising:
a plurality of touch driving electrodes; and
a plurality of touch sensing electrodes intersecting with and electrically insulated from the plurality of the touch driving electrodes,
wherein:
an individual touch driving electrode of the plurality of touch driving electrodes has an outer contour and an inner contour, the inner contour at least partially defining an area allowing a common electrode to be disposed therein, and an area of the individual touch driving electrode is substantially less than that defined by the outer contour,
each touch sensing electrode includes:
two vertical portions extended in a direction perpendicular to a length direction of the touch driving electrode,
two first connecting portions connecting with the two vertical portions at both ends of the touch sensing electrode, and
a plurality of second connecting portions positioned between the two first connecting portions, the second connecting portions connecting with the two vertical portions to form an H-type structure.

2. The touch display panel of claim 1 , wherein:
the outer contour defines an overall outside shape occupied by the touch driving electrode; and
the inner contour defines an overall inside void within the touch driving electrode.

3. The touch display panel of claim 2 , wherein:
the outer contour has a quadrangular shape; and
the inner contour defines the area for the common electrode to increase a total number of edges of the individual touch driving electrode contributing to fringe field capacitance between the touch driving electrode and a corresponding touch sensing electrode.

4. The touch display panel of claim 2 , wherein the individual touch driving electrode is in a shape of an enclosed frame with a hollow center portion as defined by the inner contour.

5. The touch display panel of claim 2 , wherein the individual touch driving electrode is in a shape of an open frame with a hollow center portion as the inner contour.

6. The touch display panel of claim 5 , further including:
a plurality of common electrode line leads supplying common electrode signals to the plurality of common electrodes lines,
wherein the common electrode line leads and the common electrode lines are formed at a same layer.

7. The touch display panel of claim 1 , further including:
a plurality of common electrode lines positioned within and confined by the inner contours of the plurality of touch driving electrodes, the common electrode lines being electrically insulated from the touch driving electrodes.

8. The touch display panel of claim 7 , further including:
a plurality of common electrode line leads supplying common electrode signals to the plurality of common electrodes lines,
wherein the common electrode line leads and the common electrode lines are formed in different layers; and
the common electrode line leads are electrically connected to the common electrode lines through via holes.

9. The touch display panel of claim 1 , wherein:
projection of the second connecting portions onto a layer forming the touch driving electrodes falls within areas confined by the inner contours of the touch driving electrodes.

10. The touch display panel of claim 1 , further including:
a plurality of touch driving electrode leads for respectively supplying touch driving signals to the plurality of touch driving electrodes during a touch driving phase of the touch display panel, and for respectively common voltage signals to touch driving electrodes during the display phase, when the plurality of touch driving electrodes also serve as common electrode lines.

11. The touch display panel of claim 1 , wherein: the touch display panel comprises two substrates, the touch driving electrodes and the touch sensing electrodes are placed on different substrates.

12. A touch display apparatus comprising the touch display panel of claim 1 .

13. A driving method for a touch display panel having a plurality of touch driving electrodes, a plurality of touch sensing electrodes intersecting with and electrically insulated from the plurality of the touch driving electrodes, and a plurality of common electrode lines electrically insulated from the touch driving electrodes, wherein an individual touch driving electrode of the plurality of touch driving electrodes has an outer contour and an inner contour, the inner contour is configured to allow a common electrode to be disposed within, an area of the individual touch driving electrode is substantially less than that of the outer contour, and the common electrode lines are positioned within and confined by the inner contours of the plurality of touch driving electrodes, the driving method comprising:
supplying touch driving signals to the touch driving electrodes in a touch driving phase, and
supplying a common voltage signal to the touch driving electrodes in a display phase, including:
supplying the common voltage signal to the touch driving electrodes and the common voltage signal to the common electrode lines in the display phase; and
supplying no signal or a constant DC voltage signal to the common electrode lines in the touch driving phase.

Assignees

• Boe Technology Group Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Zhao Lijun

Classifications

• G06F3/0418 Primary

  for error correction or compensation, e.g. based on parallax, calibration or alignment · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F2203/04111

  Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title