Granted Patent B2

US 12,236,037 · App. 17/427,092 · Granted Feb 25, 2025

Inventor: Lei Gao (Shenzhen, CN)

Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.

G06F3/0416G06F3/044G06F3/046

Abstract

Claims (49)

1. A touch control device, comprising a touch control substrate, wherein the touch control substrate comprises a base and a touch control circuit arranged on the base, and the touch control device further comprises a touch control mode switching circuit electrically connected to the touch control circuit, the touch control mode switching circuit controls the touch control circuit to switch between a capacitive touch control circuit and an electromagnetic touch control circuit, and at least part of sensing signal lines of the capacitive touch control circuit also serves as sensing signal lines of the electromagnetic touch control circuit;

wherein the touch control circuit comprises a plurality of first touch control lines and a plurality of second touch control lines, the first touch control lines intersect and are insulated from the second touch control lines;

wherein the touch control mode switching circuit comprises a first switch control circuit and a second switch control circuit, at least two of the first touch control lines are electrically connected to the first switch control circuit, and at least two of the second touch control lines are electrically connected to the second switch control circuit;

wherein when each of the first switch control circuit and the second switch control circuit is in an off mode, the at least two of the first touch control lines are disconnected from each other, the at least two second touch control lines are disconnected from each other, and the touch control circuit is a mutual capacitive touch control circuit; and

wherein when each of the first switch control circuit and the second switch control circuit is in an on mode, two of the first touch control lines are electrically connected to each other, and two of the second touch control lines are electrically connected to each other, and the touch control circuit is the electromagnetic touch control circuit;

wherein the touch control device further comprises a display panel, and the first touch control lines and the second touch control lines are respectively disposed on opposite sides of a cover plate of the display panel.

2. The touch control device according to claim 1 , wherein all of the sensing signal lines of the capacitive touch control circuit located in a display area of the display panel also serve as the sensing signal lines of the electromagnetic touch control circuit.

3. The touch control device according to claim 1 , wherein the first switch control circuit comprises a first switch, and opposite terminals of the first switch are electrically connected to adjacent ones of the first touch control lines, respectively; and the second switch control circuit comprises a second switch, and opposite terminals of the second switch are electrically connected to adjacent ones of the second touch control lines, respectively;

wherein when the touch control circuit is the mutual capacitive touch control circuit, the first switch and the second switch are both turned off, the adjacent ones of the first touch control lines are disconnected from each other, and the adjacent ones of the second touch control lines are disconnected from each other; and

wherein when the touch control circuit is the electromagnetic touch control circuit, the first switch and the second switch are both turned on, the adjacent ones of the first touch control lines are electrically connected to each other, and the adjacent ones of the second touch control lines are electrically connected to each other.

4. The touch control device according to claim 1 , wherein when the touch control circuit is the mutual capacitive touch control circuit, the first touch control lines are transmission signal lines, and the second touch control lines are the sensing signal lines; and

wherein when the touch control circuit is the electromagnetic touch control circuit, the first touch control lines and the second touch control lines are both the sensing signal lines.

5. The touch control device according to claim 1 , wherein the touch control mode switching circuit comprises a touch control chip and a switch control circuit, and the first touch control lines and the second touch control lines are respectively electrically connected to the touch control chip;

wherein when the touch control circuit is the mutual capacitive touch control circuit, the touch control chip outputs a touch control transmission signal to the first touch control lines, and the second touch control lines feed back touch control sensing signals to the touch control chip; and

wherein when the touch control circuit is the electromagnetic touch control circuit, the touch control chip is built in with a first current measuring device and a second current measuring device; both terminals of the first current measuring device are respectively electrically connected to the first touch control lines in two rows that are electrically connected to each other, and both terminals of the second current measuring device are respectively electrically connected to the second touch control lines in two columns that are electrically connected to each other; and the first touch control lines and the second touch control lines are electrically connected to each other, and the first touch control lines and the second touch control lines feed back the touch control sensing signals to the touch control chip.

6. The touch control device according to claim 1 , wherein the touch control mode switching circuit comprises a touch control chip, and the first switch control circuit and the second switch control circuit are built in the touch control chip.

7. The touch control device according to claim 1 , further comprising a display panel, wherein in one scan period of the display panel, the touch control mode switching circuit controls the touch control circuit to switch between the capacitive touch control circuit and the electromagnetic touch control circuit at least once.

8. A touch control device, comprising a touch control substrate with a display area, wherein the touch control substrate comprises a base and a touch control circuit arranged on the base, and the touch control device further comprises a touch control mode switching circuit electrically connected to the touch control circuit, the touch control mode switching circuit controls the touch control circuit to switch between a capacitive touch control circuit and an electromagnetic touch control circuit, and at least part of sensing signal lines of the capacitive touch control circuit also serves as sensing signal lines of the electromagnetic touch control circuit;

wherein the touch control circuit comprises a plurality of sensing circuit units, each of the sensing circuit units comprises one of first touch control lines, opposite terminals of the first touch control lines are electrically connected to the touch control mode switching circuit, respectively;

wherein the touch control mode switching circuit comprises a touch control chip and a selection switch control circuit; wherein when the selection switch control circuit selects a first channel, a first terminal of the first touch control lines is electrically connected to a second signal terminal of the touch control chip, a second terminal of the first touch control lines is electrically connected to a first signal terminal of the touch control chip, and the touch control circuit is the electromagnetic touch control circuit; and

wherein when the selection switch control circuit selects a second channel, the first terminal of the first touch control lines is connected to the second terminal of the first touch control lines, and the second terminal of the first touch control lines is electrically connected to the first signal terminal of the touch control chip, and the touch control circuit is a self-capacitive touch control circuit.

9. The touch control device according to claim 8 , wherein all of the sensing signal lines of the capacitive touch control circuit located in the display area also serve as the sensing signal lines of the electromagnetic touch control circuit.

10. The touch control device according to claim 8 , wherein the touch control circuit comprises a plurality of first touch control lines and a plurality of second touch control lines, the first touch control lines intersect and are insulated from the second touch control lines;

wherein the touch control mode switching circuit comprises a first switch control circuit and a second switch control circuit, at least two of the first touch control lines are electrically connected to the first switch control circuit, and at least two of the second touch control lines are electrically connected to the second switch control circuit;

wherein when each of the first switch control circuit and the second switch control circuit is in an off mode, the at least two of the first touch control lines are disconnected from each other, the at least two second touch control lines are disconnected from each other, and the touch control circuit is a mutual capacitive touch control circuit; and

wherein when each of the first switch control circuit and the second switch control circuit is in an on mode, two of the first touch control lines are electrically connected to each other, and two of the second touch control lines are electrically connected to each other, and the touch control circuit is the electromagnetic touch control circuit.

11. The touch control device according to claim 8 , wherein each of the sensing circuit units comprises the first touch control lines in a coil shape;

wherein when the touch control circuit is the electromagnetic touch control circuit, the first touch control lines form a coil-shaped electromagnetic sensing circuit, and the first touch control lines are electromagnetic sensing signal lines; and

wherein when the touch control circuit is the self-capacitive touch control circuit, the first touch control lines are capacitive sensing signal lines.

12. The touch control device according to claim 8 , wherein the selection switch control circuit comprises a plurality of selection switches, and the first terminal of the first touch control lines is electrically connected to a selection terminal of the selection switches, the second terminal of the first touch control lines is electrically connected to the first signal terminal of the touch control chip, a first channel of the selection switches is electrically connected to the second signal terminal of the touch control chip, and a second channel of the selection switches is electrically connected to the first signal terminal of the touch control chip; and

wherein the touch control mode switching circuit comprises a first current measuring device electrically connected to the first terminal and the second terminal of the first touch control lines, respectively.

13. The touch control device according to claim 12 , wherein the first current measuring device is built in the touch control chip.

14. A touch control device, comprising a touch control substrate, wherein the touch control substrate comprises a base and a touch control circuit arranged on the base, and the touch control device further comprises a touch control mode switching circuit electrically connected to the touch control circuit, the touch control mode switching circuit controls the touch control circuit to switch between a capacitive touch control circuit and an electromagnetic touch control circuit, and at least part of sensing signal lines of the capacitive touch control circuit also serves as sensing signal lines of the electromagnetic touch control circuit;

wherein the touch control circuit comprises a plurality of first touch control lines and a plurality of second touch control lines, the first touch control lines intersect and are insulated from the second touch control lines;

wherein the touch control mode switching circuit comprises a first switch control circuit and a second switch control circuit, at least two of the first touch control lines are electrically connected to the first switch control circuit, and at least two of the second touch control lines are electrically connected to the second switch control circuit;

wherein when each of the first switch control circuit and the second switch control circuit is in an off mode, the at least two of the first touch control lines are disconnected from each other, the at least two second touch control lines are disconnected from each other, and the touch control circuit is a mutual capacitive touch control circuit; and

wherein when each of the first switch control circuit and the second switch control circuit is in an on mode, two of the first touch control lines are electrically connected to each other, and two of the second touch control lines are electrically connected to each other, and the touch control circuit is the electromagnetic touch control circuit;

wherein the touch control device further comprises a display panel, and the first touch control lines and the second touch control lines are insulated from each other and arranged on a same side of a cover plate of the display panel;

wherein the touch control mode switching circuit comprises a touch control chip and a switch control circuit, and the first touch control lines and the second touch control lines are respectively electrically connected to the touch control chip;

wherein when the touch control circuit is the mutual capacitive touch control circuit, the touch control chip outputs a touch control transmission signal to the first touch control lines, and the second touch control lines feed back touch control sensing signals to the touch control chip; and

wherein when the touch control circuit is the electromagnetic touch control circuit, the touch control chip is built in with a first current measuring device and a second current measuring device; both terminals of the first current measuring device are respectively electrically connected to the first touch control lines in two rows that are electrically connected to each other, and both terminals of the second current measuring device are respectively electrically connected to the second touch control lines in two columns that are electrically connected to each other; and the first touch control lines and the second touch control lines are electrically connected to each other, and the first touch control lines and the second touch control lines feed back the touch control sensing signals to the touch control chip.

15. The touch control device according to claim 14 , wherein all of the sensing signal lines of the capacitive touch control circuit located in a display area of the display panel also serve as the sensing signal lines of the electromagnetic touch control circuit.

16. The touch control device according to claim 14 , wherein the first switch control circuit comprises a first switch, and opposite terminals of the first switch are electrically connected to adjacent ones of the first touch control lines, respectively; and the second switch control circuit comprises a second switch, and opposite terminals of the second switch are electrically connected to adjacent ones of the second touch control lines, respectively;

wherein when the touch control circuit is the mutual capacitive touch control circuit, the first switch and the second switch are both turned off, the adjacent ones of the first touch control lines are disconnected from each other, and the adjacent ones of the second touch control lines are disconnected from each other; and

wherein when the touch control circuit is the electromagnetic touch control circuit, the first switch and the second switch are both turned on, the adjacent ones of the first touch control lines are electrically connected to each other, and the adjacent ones of the second touch control lines are electrically connected to each other.

17. The touch control device according to claim 14 , wherein when the touch control circuit is the mutual capacitive touch control circuit, the first touch control lines are transmission signal lines, and the second touch control lines are the sensing signal lines; and

wherein when the touch control circuit is the electromagnetic touch control circuit, the first touch control lines and the second touch control lines are both the sensing signal lines.

18. The touch control device according to claim 14 , wherein the first touch control lines and the second touch control lines are arranged in a same layer, and the first touch control lines are bridged at an intersection with the second touch control lines by a conductive structure located in another layer.

19. The touch control device according to claim 14 , wherein the touch control mode switching circuit comprises a touch control chip, and the first switch control circuit and the second switch control circuit are built in the touch control chip.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (20)

Cited By (1)

US 12,498,822