Touch-control display panel and touch-control display device

• US 10,365,752 B2
• Filed: 09/19/2016
• Issued: 07/30/2019
• Est. Priority Date: 07/07/2016
• Status: Active Grant

• Current Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Original Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited)
• Inventors: Liu, Liang, Lu, Feng, Ma, Shaolong, Yao, Qijun, Zhou, Xingyao
• Primary Examiner(s): Ghebretinsae, Temesghen
• Assistant Examiner(s): Quiles, Ivelisse Martinez
• Application Number:
  US15/269,797
• Publication Number:
  US 20170010742A1
• Time in Patent Office: 1,044 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/0414 using force sensing means to determine a position
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A touch control display panel and a touch control display device are provided. The touch control display panel comprises a substrate having a first extending direction and a second extending direction; and at least one force sensing bridge including a first sensing resistor, a second sensing resistor, a third sensing resistor, and a fourth sensing resistor. The first sensing resistor has a longer extending length in the first extending direction than in the second extending direction. The second sensing resistor has a longer extending length in the second extending direction than in the first extending direction. The third sensing resistor has a longer extending length in the first extending direction than in the second extending direction. The fourth sensing resistor has a longer extending length in the second extending direction than in the first extending direction.

Claims

1. A touch control display panel, comprising:

a first substrate having a first extending direction and a second extending direction intersecting the first extending direction;

a second substrate opposing the first substrate; and

at least one force sensing bridge including a first sensing resistor, a second sensing resistor, a third sensing resistor, and a fourth sensing resistor,

wherein;

a first end of the first sensing resistor and a first end of the fourth sensing resistor are electrically connected to an input terminal of a first power supply, respectively,

a second end of the first sensing resistor and a first end of the second sensing resistor are electrically connected to a first sensing signal measurement terminal, respectively,

a second end of the fourth sensing resistor and a first end of the third sensing resistor are electrically connected to a second sensing signal measurement terminal, respectively,

a second end of the second sensing resistor and a second end of the third sensing resistor are electrically connected to an input terminal of a second power supply, respectively,

from the first end of the first sensing resistor to the second end of the first sensing resistor, the first sensing resistor has a longer extending length in the first extending direction than in the second extending direction,

from the first end of the second sensing resistor to the second end of the second sensing resistor, the second sensing resistor has a longer extending length in the second extending direction than in the first extending direction,

from the first end of the third sensing resistor to the second end of the third sensing resistor, the third sensing resistor has a longer extending length in the first extending direction than in the second extending direction,

from the first end of the fourth sensing resistor to the second end of the fourth sensing resistor, the fourth sensing resistor has a longer extending length in the second extending direction than in the first extending direction,

the first sensing resistor and the third sensing resistor are disposed in a first layer,

the second sensing resistor and the fourth sensing resistor are disposed in a second layer different from the first layer,

an orthogonal projection of the first sensing resistor onto the first substrate is overlapped with an orthogonal projection of the second sensing resistor onto the first substrate,

an orthogonal projection of the third sensing resistor onto the first substrate is overlapped with an orthogonal projection of the fourth sensing resistor onto the first substrate, and

the first substrate includes a plurality of data lines and a plurality of scanning lines intersecting the plurality of data lines,

the at least one force sensing bridge is disposed in a light-shielding area corresponding to an intersection between one of the plurality of data lines and one of the plurality of scanning lines, and

an orthogonal projection of the at least one force sensing bridge onto the first substrate is within an orthogonal projection of the light-shielding area onto the first substrate.

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

the first extending direction is perpendicular to the second extending direction.

3. The touch control display panel according to claim 1, wherein:

the first substrate has a rectangular shape;

the first extending direction is along a long side of the rectangular shape;

and the second extending direction is along a short side of the rectangular shape.

4. The touch control display panel according to claim 1, wherein:

the first sensing resistor, the second sensing resistor, the third sensing resistor, and the fourth sensing resistor are made of metals.

5. The touch control display panel according to claim 4, wherein:

the metals include indium tin oxide (ITO).

6. The touch control display panel according to claim 1, wherein:

the first sensing resistor, the second sensing resistor, the third sensing resistor, and the fourth sensing resistor have a same initial resistance.

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

at least one of the first sensing resistor, the second sensing resistor, the third sensing resistor, and the fourth sensing resistor has a folded linear structure.

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

at least two driving lines disposed on the first substrate, and electrically connected to the input terminal of the first power supply and the input terminal of the second power supply, respectively; and

at least two detecting lines disposed on the first substrate, and electrically connected to the first sensing signal measurement terminal and the second sensing signal measurement terminal, respectively.

9. The touch control display panel according to claim 1, wherein:

the first substrate is an array substrate including a plurality of switches; and

the second substrate is a color film substrate including a plurality of color filters.

10. A touch control display panel, comprising:

a substrate having a first extending direction and a second extending direction intersecting the first extending direction; and

at least one force sensing bridge including a first sensing resistor, a second sensing resistor, a third sensing resistor, and a fourth sensing resistor,

wherein;

a first end of the first sensing resistor and a first end of the fourth sensing resistor are electrically connected to an input terminal of a first power supply, respectively,

a second end of the first sensing resistor and a first end of the second sensing resistor are electrically connected to a first sensing signal measurement terminal, respectively,

a second end of the fourth sensing resistor and a first end of the third sensing resistor are electrically connected to a second sensing signal measurement terminal, respectively,

a second end of the second sensing resistor and a second end of the third sensing resistor are electrically connected to an input terminal of a second power supply, respectively,

from the first end of the first sensing resistor to the second end of the first sensing resistor, the first sensing resistor has a longer extending length in the first extending direction than in the second extending direction,

from the first end of the second sensing resistor to the second end of the second sensing resistor, the second sensing resistor has a longer extending length in the second extending direction than in the first extending direction,

from the first end of the third sensing resistor to the second end of the third sensing resistor, the third sensing resistor has a longer extending length in the first extending direction than in the second extending direction, and

from the first end of the fourth sensing resistor to the second end of the fourth sensing resistor, the fourth sensing resistor has a longer extending length in the second extending direction than in the first extending direction,

wherein;

the first sensing resistor, the second sensing resistor, the third sensing resistor, and the fourth sensing resistor are disposed in a same layer,

the first sensing resistor includes at least two first-sensing-resistor units connected in series,

the second sensing resistor includes at least two second-sensing-resistor units connected in series,

each of the at least two first-sensing-resistor units and each of the at least two second-sensing-resistor units are alternately arranged in both the first extending direction and the second extending direction,

the at least two first-sensing-resistor units connected in series are point symmetrical with respect to a first center point, and

the at least two second-sensing-resistor units connected in series are point symmetrical with respect to the first center point.

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

the third sensing resistor includes at least two third-sensing-resistor units connected in series; and

the fourth sensing resistor includes at least two fourth-sensing-resistor units connected in series.

12. The touch control display panel according to claim 11, wherein:

each of the at least two third-sensing-resistor units connected in series and each of the at least two fourth-sensing-resistor units connected in series are alternately arranged in both the first extending direction and the second extending direction, the at least two third-sensing-resistor units connected in series are point symmetrical with respect to a second center point, and the at least two fourth-sensing-resistor units connected in series are point symmetrical with respect to the second center point.

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

a distance between a first point and a second point is approximately 0.1 mm˜

5 mm, wherein the first point is a farthest point of the first sensing resistor away from the second sensing resistor, and the second point is a farthest point of the second sensing resistor away from the first sensing resistor; and

a distance between a third point and a fourth point is approximately 0.1 mm˜

5 mm, wherein the third point is a farthest point of the third sensing resistor away from the fourth sensing resistor, and the fourth point is a farthest point of the fourth sensing resistor away from the third sensing resistor.

14. The touch control display panel according to claim 10, further including:

at least two driving lines disposed on the substrate, and electrically connected to the input terminal of the first power supply and the input terminal of the second power supply, respectively; and

at least two detecting lines disposed on the substrate, and electrically connected to the first sensing signal measurement terminal and the second sensing signal measurement terminal, respectively.

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

the first sensing resistor, the second sensing resistor, the third sensing resistor, and the fourth sensing resistor have a same initial resistance.

16. The touch control display panel according to claim 15, wherein:

at least one of the first sensing resistor, the second sensing resistor, the third sensing resistor, and the fourth sensing resistor has a folded linear structure.

17. A touch control display device, comprising:

a touch control display panel,

wherein the touch control display panel comprises;

a substrate having a first extending direction and a second extending direction intersecting the first extending direction;

at least one force sensing bridge including a first sensing resistor, a second sensing resistor, a third sensing resistor, and a fourth sensing resistor,

wherein;

a first end of the first sensing resistor and a first end of the fourth sensing resistor are electrically connected to an input terminal of a first power supply, respectively,

a second end of the first sensing resistor and a first end of the second sensing resistor are electrically connected to a first sensing signal measurement terminal, respectively,

a second end of the fourth sensing resistor and a first end of the third sensing resistor are electrically connected to a second sensing signal measurement terminal, respectively,

a second end of the second sensing resistor and a second end of the third sensing resistor are electrically connected to an input terminal of a second power supply, respectively,

from the first end of the first sensing resistor to the second end of the first sensing resistor, the first sensing resistor has a longer extending length in the first extending direction than in the second extending direction,

from the first end of the second sensing resistor to the second end of the second sensing resistor, the second sensing resistor has a longer extending length in the second extending direction than in the first extending direction,

from the first end of the third sensing resistor to the second end of the third sensing resistor, the third sensing resistor has a longer extending length in the first extending direction than in the second extending direction,

from the first end of the fourth sensing resistor to the second end of the fourth sensing resistor, the fourth sensing resistor has a longer extending length in the second extending direction than in the first extending direction,

wherein;

the first sensing resistor, the second sensing resistor, the third sensing resistor, and the fourth sensing resistor are disposed in a same layer,

the first sensing resistor includes at least two first-sensing-resistor units connected in series,

the second sensing resistor includes at least two second-sensing-resistor units connected in series,

each of the at least two first-sensing-resistor units and each of the at least two second-sensing-resistor units are alternately arranged in both the first extending direction and the second extending direction,

the at least two first-sensing-resistor units connected in series are point symmetrical with respect to a first center point, and

the at least two second-sensing-resistor units connected in series are point symmetrical with respect to the first center point.

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

the first extending direction is perpendicular to the second extending direction.

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

the substrate has a rectangular shape;

the first extending direction is along a long side of the rectangular shape;

and the second extending direction is along a short side of the rectangular shape.

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

a distance between a first point and a second point is approximately 0.1 mm˜

5 mm, wherein the first point is a farthest point of the first sensing resistor away from the second sensing resistor, and the second point is a farthest point of the second sensing resistor away from the first sensing resistor; and

a distance between a third point and a fourth point is approximately 0.1 mm˜

5 mm, wherein the third point is a farthest point of the third sensing resistor away from the fourth sensing resistor, and the fourth point is a farthest point of the fourth sensing resistor away from the third sensing resistor.