Touch structure for touch display panel

• US 10,353,498 B2
• Filed: 03/05/2018
• Issued: 07/16/2019
• Est. Priority Date: 12/08/2017
• Status: Active Grant

• Current Assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Ltd.
• Original Assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Ltd.
• Inventors: Feng, Xiaoliang
• Primary Examiner(s): Karimi, Pegeman
• Application Number:
  US15/911,404
• Publication Number:
  US 20190179439A1
• Time in Patent Office: 498 Days
• CPC Class Codes: G06F 2203/04101 2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04111 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 Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

A touch structure for touch display pane includes a plurality of first sensing strip, each of first sensing strips is extending along first direction and first sensing strips are parallel to each other and separately positioned, each of first sensing strips comprises a plurality of first sensing pad and a plurality of first bridge connector connecting in cascade with first sensing pads; a plurality of second sensing strip, each of second sensing strips is extending along second direction which is perpendicular to first direction and second sensing strips are parallel to each other and separately positioned, each of second sensing strips comprises a plurality of second sensing pad and a plurality of second bridge connector connecting in cascade with second sensing pads, second bridge connector is insulating with first bridge connector.

Claims

1. A touch structure for touch display panel, comprising a plurality of first sensing strip, each of the first sensing strips is extending along a first direction and the plurality of the first sensing strip are parallel to each other and separately positioned, each of the first sensing strips comprises a plurality of first sensing pad and a plurality of first bridge connector connecting in cascade with the plurality of first sensing pad, two adjacent the first sensing pads of each of the first sensing strips connected in cascade with at least two of the first bridge connectors;

a plurality of second sensing strip, each of the second sensing strips is extending along a second direction which is perpendicular to the first direction and the plurality of the second sensing strip are parallel to each other and separately positioned, each of the second sensing strips comprises a plurality of second sensing pad and a plurality of second bridge connector connecting in cascade with the plurality of second sensing pad, two adjacent the second sensing pads of each of the first sensing strips connected in cascade with at least two of the second bridge connectors;

wherein each of the second sensing strips crosses to the plurality of the first sensing strips, each of the second bridge connectors crosses all of the first bridge connectors which are positioned between two adjacent correspondingly the first sensing pads, and an insulating body is disposed on an overlapping position of the second bridge connector and the first bridge connector;

wherein the first sensing pad and/or the second sensing pad is octagon, the first sensing pad has a first channel and a second channel are opened along a first side of the octagon and parallel to each other, and a third channel and a fourth channel are opened along a second side of the octagon and parallel to each other, the first side is opposite to the second side, extending direction of the first channel and the third channel are coincidence and independent, extending direction of the second channel and the fourth channel are coincidence and independent; and

wherein the first sensing pad has a fifth channel and a sixth channel are opened along a third side of the octagon and parallel to each other, and a seventh channel and an eighth channel are opened along a fourth side of the octagon and parallel to each other, the third side is opposite to the fourth side, and the third side is not connecting with the first side and the second side, the fourth side is not connecting with the first side and the second side, extending direction of the fifth channel and the seventh channel are coincidence and independent, extending direction of the sixth channel and the eighth channel are coincidence and independent.

2. The touch structure for touch display panel according to claim 1, wherein the first sensing pad further comprises a first bending groove, a second bending groove, a third bending groove and a fourth bending groove are array arrangement, the first bending groove, the second bending groove, the third bending groove and the fourth bending groove are L-shaped, and bending sites of the first bending groove, the second bending groove, the third bending groove and the fourth bending groove are corresponding to each other.

3. The touch structure for touch display panel according to claim 2, wherein the first bending groove is corresponding to the first channel, and extending direction of one groove of the first bending groove is coincidence to extending direction of the first channel, extending direction of another groove of the first bending groove is coincidence to extending direction of the fifth channel;

the second bending groove is corresponding to the second channel, and extending direction of one groove of the second bending groove is coincidence to extending direction of the second channel, extending direction of another groove of the second bending groove is coincidence to extending direction of the seventh channel;

the third bending groove is corresponding to the third channel, and extending direction of one groove of the third bending groove is coincidence to extending direction of the third channel, extending direction of another groove of the third bending groove is coincidence to extending direction of the sixth channel;

the fourth bending groove is corresponding to the fourth channel, and extending direction of one groove of the fourth bending groove is coincidence to extending direction of the fourth channel, extending direction of another groove of the fourth bending groove is coincidence to extending direction of the eighth channel.

4. The touch structure for touch display panel according to claim 1, wherein in each of the first sensing strips, part of two adjacent first sensing pads which located between the first channel and the second channel is connecting in cascade with the first bridge connector, part of two adjacent first sensing pads which located on a side of the first channel which backward to the second channel is connecting cascade in with the first bridge connector, part of two adjacent first sensing pads which located on a side of the second channel which backward to the first channel is connecting cascade with the first bridge connector.

5. The touch structure for touch display panel according to claim 1, wherein the first sensing pad and the second sensing pad have same structures.