Touch control display panel and touch control display device

• US 10,082,905 B2
• Filed: 03/08/2017
• Issued: 09/25/2018
• Est. Priority Date: 10/31/2016
• Status: Active Grant

• Current Assignee: Tianma Microelectronics Company Limited, Xiamen Tianma Micro-Electronics Co., Ltd.
• Original Assignee: Tianma Microelectronics Company Limited, Xiamen Tianma Micro-Electronics Co., Ltd.
• Inventors: Tu, Jun, Wu, Changzhi, Yang, Kangpeng, Xu, Yumin, Hou, Mingchao
• Primary Examiner(s): CERULLO, LILIANA P
• Application Number:
  US15/452,774
• Publication Number:
  US 20170177158A1
• Time in Patent Office: 566 Days
• 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 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• 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
• CPC Class Codes: G09G 2310/0286 Details of a shift registers arranged for use in a driving circuit
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G11C 19/00 Digital stores in which the information is moved stepwise, e.g. shift registers

Abstract

A touch control display panel and a touch control display device are provided. The touch control display panel comprises a shift register including a plurality of cascaded shift register units, wherein a scanning line is electrically connected to an output terminal of a shift register unit; a touch driving electrode array including a plurality of touch driving electrodes; a touch switching control circuit and a plurality of touch signal lines, wherein a touch signal line has one end electrically connected to a touch driving electrode and the other end electrically connected to an output terminal of the touch switching control circuit; and a touch signal control line cluster including a plurality of touch signal control lines, wherein a touch signal control line has one end electrically connected to the output terminal of the shift register unit, and the other end electrically connected to the touch switching control circuit.

Claims

1. A touch control display panel, comprising:

a plurality of scanning lines extending in a first direction;

a plurality of data lines extending in a second direction and intersecting the scanning lines;

a pixel array confined by the scanning lines and the data lines;

a shift register including a plurality of cascaded shift register units, wherein a scanning line is electrically connected to an output terminal of a shift register unit;

a touch driving electrode array including a plurality of touch driving electrodes;

a touch switching control circuit and a plurality of touch signal lines, wherein a touch signal line has one end electrically connected to a touch driving electrode and the other end electrically connected to an output terminal of the touch switching control circuit; and

a touch signal control line cluster including a plurality of touch signal control lines, wherein a touch signal control line has one end electrically connected to the output terminal of the shift register unit, and the other end electrically connected to the touch switching control circuit,

wherein the touch switching control circuit is controlled by the touch signal control line to provide a touch driving signal to the touch signal line, and

the output terminal of the shift register unit is electrically connected to both the scanning line and the one end of the touch signal control line.

2. The touch control display panel according to claim 1, further including:

a first conductive layer;

a second conductive layer; and

a first insulating layer formed between the first conductive layer and the second conductive layer,

wherein the scanning lines and the data lines are formed in the first conductive layer and the second conductive layer, respectively,

the touch signal control line includes a first segment extending in the first direction and a second segment extending in the second direction, and

the first segment of the touch signal control lines has one end electrically connected to the output terminal of the shift register unit, and the other end electrically connected to one end of the second segment of the same touch signal control line, and the second segment of the same touch signal control line has the other end electrically connected to a control terminal of the touch switching control circuit.

3. The touch control display panel according to claim 2, wherein:

the first segment and the second segment of the touch signal control line are formed in the first conductive layer and the second conductive layer, respectively; and

the first segment of the touch signal control line is electrically connected to the second segment of the same touch signal control line via a through-hole formed in the first insulating layer.

4. The touch control display panel according to claim 2, further including:

a third conductive layer, wherein the touch signal control lines are formed in the third conductive layer.

5. The touch control display panel according to claim 2, wherein:

the touch signal control line cluster includes a plurality of touch signal control line groups; and

a touch signal control line group includes a plurality of touch signal control lines one-to-one corresponding to the plurality of the touch driving electrodes.

6. The touch control display panel according to claim 5, wherein:

the touch control display panel includes m number of scanning lines;

the touch signal control line cluster includes two touch signal control line groups; and

two touch signal control lines, corresponding to the same touch driving electrode, are electrically connected to the output terminal of the i-th shift register unit and the output terminal of the j-th stage shift register unit, respectively,

where the two touch signal control lines are disposed in the two touch signal control line groups, respectively, m is a positive integer, i and j are natural numbers, and |i−

j|≥

m/2.

7. The touch control display panel according to claim 5, wherein:

the second segments of the touch signal control lines, corresponding to the same touch driving electrode, are at least partially overlapped with each other.

8. The touch control display panel according to claim 1, further including:

a touch driving signal terminal,

wherein the touch switching control circuit includes a plurality of first transistors,

a first transistor has a gate electrode electrically connected to one touch signal control line in each touch signal control line cluster, a first electrode electrically connected to the touch signal line, and a second electrode electrically connected to the touch driving signal terminal.

9. The touch control display panel according to claim 8, further including:

a common voltage signal terminal; and

a display switching control signal terminal,

wherein controlled by a signal from the display switching control signal terminal, the touch switching control circuit provides a common voltage signal supplied from the common voltage signal terminal to the touch signal line,

the touch switching control circuit further includes a plurality of second transistors, and

a second transistor has a gate electrode electrically connected to the display switch control signal terminal, a first electrode electrically connected to the common voltage signal terminal, and a second electrode electrically connected to the first electrode of the first transistor.

10. The touch control display panel according to claim 9, wherein:

a frame period includes a touch detection stage and a display stage;

during the touch detection stage, the touch signal control line control the first transistor to be turned on, such that each touch driving electrode receives the signal transmitted from the corresponding touch signal control line; and

during the display stage, each second transistor is turned on, such that each touch driving electrode receives the common voltage signal,

wherein the first transistor and the second transistor, electrically connected to the same touch driving electrode, are not simultaneously turned on.

11. The touch control display panel according to claim 8, further including:

a plurality of resistors,

wherein a resistor is connected between the output terminal of the shift register unit electrically connected to the touch signal control line and the touch switching control circuit, such that the signal outputted from each touch signal control line into the touch switching control circuit have a same magnitude of amplitude.

12. The touch control display panel according to claim 8, further including:

a display area and a non-display area,

wherein the non-display area is surrounding the display area;

the non-display area includes a first frame region, and a second frame region connecting to the first frame region; and

the shift register and the touch switching control circuit are formed in the first frame region and the second frame region, respectively.

13. The touch control display panel according to claim 12, further including:

a touch sensing electrode array including a plurality of touch sensing electrodes,

wherein an orthogonal projection of a touch sensing electrode onto the touch driving electrode array partially overlaps with respective touch driving electrode.

14. The touch control display panel according to claim 13, wherein:

the touch driving electrode is a striped electrode extending in the second direction; and

the touch sensing electrode is a striped electrode extending in the first direction.

15. A touch control display device, comprising:

a touch control display panel,

wherein the touch control display panel comprises;

a plurality of scanning lines extending in a first direction;

a plurality of data lines extending in a second direction and intersecting the scanning lines;

a pixel array confined by the scanning lines and the data lines;

a shift register including a plurality of cascaded shift register units, wherein a scanning line is electrically connected to an output terminal of a shift register unit;

a touch driving electrode array including a plurality of touch driving electrodes;

a touch switching control circuit and a plurality of touch signal lines, wherein a touch signal line has one end electrically connected to a touch driving electrode and the other end electrically connected to an output terminal of the touch switching control circuit; and

a touch signal control line cluster including a plurality of touch signal control lines, wherein a touch signal control line has one end electrically connected to the output terminal of the shift register unit, and the other end electrically connected to the touch switching control circuit,

wherein the touch switching control circuit is controlled by the touch signal control line to provide a touch driving signal to the touch signal line, and

the output terminal of the shift register unit is electrically connected to both the scanning line and the one end of the touch signal control line.

16. The touch control display device according to claim 15, further including:

a first conductive layer;

a second conductive layer; and

a first insulating layer formed between the first conductive layer and the second conductive layer,

wherein the scanning lines and the data lines are formed in the first conductive layer and the second conductive layer, respectively,

the touch signal control line includes a first segment extending in the first direction and a second segment extending in the second direction, and

the first segment of the touch signal control lines has one end electrically connected to the output terminal of the shift register unit, and the other end electrically connected to one end of the second segment of the same touch signal control line, and the second segment of the same touch signal control line has the other end electrically connected to a control terminal of the touch switching control circuit.

17. The touch control display device according to claim 16, wherein:

the first segment and the second segment of the touch signal control line are formed in the first conductive layer and the second conductive layer, respectively; and

the first segment of the touch signal control line is electrically connected to the second segment of the same touch signal control line via a through-hole formed in the first insulating layer.

18. The touch control display device according to claim 16, wherein:

the touch signal control line cluster includes a plurality of touch signal control line groups; and

a touch signal control line group includes a plurality of touch signal control lines one-to-one corresponding to the plurality of the touch driving electrodes.

19. The touch control display device according to claim 18, wherein:

the touch control display panel includes m number of scanning lines;

the touch signal control line cluster includes two touch signal control line groups; and

two touch signal control lines, corresponding to the same touch driving electrode, are electrically connected to the output terminal of the i-th shift register unit and the output terminal of the j-th stage shift register unit, respectively,

where the two touch signal control lines are disposed in the two touch signal control line groups, respectively, m is a positive integer, i and j are natural numbers, and |i−

j|≥

m/2.