US-20260126864-A1 - TOUCH INPUT DEVICE

Abstract

The present invention relates to a multifunctional touch input device capable of detecting a touch position, driving a stylus pen, and detecting a position of the stylus pen. In one embodiment, an electronic device includes a sensor unit and a control unit. The sensor unit includes a first pattern extended along a first direction, a second pattern adjacent to the first pattern and extended along the first direction, and a third pattern extended along a second direction. The first to third patterns are arranged in an array. The other ends of the plurality of second patterns are electrically connected to each other. In a touch sensing mode, the control unit applies a touch driving signal to the first pattern and applies a signal identical to the touch driving signal to the second pattern.

Inventors

• Seyeob Kim
• Bonkee Kim
• Beomkyu KO
• Hyoungwook Woo
• Kiryoung Jung

Assignees

• HIDEEP INC.

Dates

Publication Date

20260507

Application Date

20251218

Priority Date

20210326

Claims (20)

1. 1 . An electronic device, comprising: a sensor unit; and a control unit, wherein the sensor unit comprises: a first pattern extended along a first direction; a second pattern arranged adjacent to the first pattern and extended along the first direction; and a third pattern extended along a second direction different from the first direction, wherein the first to third patterns are arranged in an array, wherein the other ends of the plurality of second patterns are electrically connected to each other, wherein the control unit is configured to operate the sensor unit in a touch sensing mode, and wherein, in the touch sensing mode, the control unit is configured to apply a touch driving signal to the first pattern and to apply a signal identical to the touch driving signal to the second pattern.
2. 2 . The electronic device of claim 1 , wherein the sensor unit further comprises a fourth pattern arranged adjacent to the third pattern and extended along the second direction, wherein the fourth pattern is arranged in an array, and wherein the other ends of the plurality of fourth patterns are electrically connected to each other.
3. 3 . The electronic device of claim 1 , wherein the third pattern comprises third-A patterns and third-B patterns arranged alternately at least one by one along the first direction, wherein the third-A patterns are electrically connected to each other, the third-B patterns are electrically connected to each other, and wherein the third-A patterns are electrically separated from the third B-patterns.
4. 4 . The electronic device of claim 3 , wherein the control unit detects a touch position based on a signal subtracted from a first sensing signal received from the third-A patterns and a second sensing signal received from the third-B patterns in the touch sensing mode.
5. 5 . The electronic device of claim 3 , wherein a third-A pattern among the third-A patterns arranged along the first direction that is farthest from the control unit is connected to the control unit, and wherein a third-B pattern among the third-B patterns arranged along the first direction that is closest to the control unit is connected to the control unit.
6. 6 . The electronic device of claim 1 , wherein the control unit controls the sensor unit to operate in a stylus driving mode, wherein one ends of the plurality of second patterns are connected to the control unit, and wherein the control unit is configured to apply a stylus driving signal to at least one or more patterns among the plurality of second patterns in the stylus driving mode.
7. 7 . The electronic device of claim 1 , wherein the control unit controls the sensor unit to operate in a stylus driving mode, wherein one ends of the plurality of second patterns are electrically open, and wherein the control unit is configured to apply a stylus driving signal to at least one or more patterns among the plurality of first patterns in the stylus driving mode.
8. 8 . The electronic device of claim 2 , wherein the control unit controls the sensor unit to operate in a stylus sensing mode, wherein one ends of the plurality of second and fourth patterns are connected to the control unit, and wherein the control unit is configured to detect a location of a stylus pen from a stylus sensing signal received through the plurality of second and fourth patterns in the stylus sensing mode.
9. 9 . The electronic device of claim 2 , wherein the control unit controls the sensor unit to operate in a stylus sensing mode, wherein one ends of the plurality of second and fourth patterns are electrically open, and wherein the control unit is configured to detect a location of a stylus pen from a stylus sensing signal received through the plurality of first and third patterns in the stylus sensing mode.
10. 10 . The electronic device of claim 9 , wherein the control unit is configured to receive a first stylus sensing signal output from the plurality of first patterns and detect the location of the stylus pen in the second direction on the sensor unit, and is configured to receive a second stylus sensing signal output from the plurality of third patterns and detect the location of the stylus pen in the first direction on the sensor unit, wherein each of the first stylus sensing signals is a current signal induced by a magnetic field signal from the stylus pen, the current signal flowing in the second pattern being introduced into the first pattern by capacitive coupling formed between the first pattern and the second pattern, and wherein each of the second stylus sensing signals is a current signal induced by a magnetic field signal from the stylus pen, the current signal flowing in the fourth pattern being introduced into the third pattern by capacitive coupling formed between the third pattern and the fourth pattern.
11. 11 . An electronic device, comprising: a sensor unit; and a control unit, wherein the sensor unit comprises: a first pattern extended along a first direction; a second pattern arranged adjacent to the first pattern and extended along the first direction; and a third pattern extended along a second direction different from the first direction, wherein the first to third patterns are arranged in an array, wherein the other ends of the plurality of second patterns are electrically connected to each other, wherein the control unit is configured to operate the sensor unit in a touch sensing mode, and wherein, in the touch sensing mode, the control unit is configured to apply a touch driving signal to the first pattern and to apply a reference potential to the second pattern.
12. 12 . The electronic device of claim 11 , wherein the sensor unit further comprises a fourth pattern arranged adjacent to the third pattern and extended along the second direction, wherein the fourth pattern is arranged in an array, and wherein the other ends of the plurality of fourth patterns are electrically connected to each other.
13. 13 . The electronic device of claim 11 , wherein the third pattern comprises third-A patterns and third-B patterns arranged alternately at least one by one along the first direction, wherein the third-A patterns are electrically connected to each other, the third-B patterns are electrically connected to each other, and wherein the third-A patterns are electrically separated from the third-B patterns.
14. 14 . The electronic device of claim 13 , wherein the control unit detects a touch position based on a signal subtracted from a first sensing signal received from the third-A patterns and a second sensing signal received from the third-B patterns in the touch sensing mode.
15. 15 . The electronic device of claim 13 , wherein a third-A pattern among the third-A patterns arranged along the first direction that is farthest from the control unit is connected to the control unit, and wherein a third-B pattern among the third-B patterns arranged along the first direction that is closest to the control unit is connected to the control unit.
16. 16 . The electronic device of claim 11 , wherein the control unit controls the sensor unit to operate in a stylus driving mode, wherein one ends of the plurality of second patterns are connected to the control unit, and wherein the control unit is configured to apply a stylus driving signal to at least one or more patterns among the plurality of second patterns in the stylus driving mode.
17. 17 . The electronic device of claim 11 , wherein the control unit controls the sensor unit to operate in a stylus driving mode, wherein one ends of the plurality of second patterns are electrically open, and wherein the control unit is configured to apply a stylus driving signal to at least one or more patterns among the plurality of first patterns in the stylus driving mode.
18. 18 . The electronic device of claim 12 , wherein the control unit controls the sensor unit to operate in a stylus sensing mode, wherein one ends of the plurality of second and fourth patterns are connected to the control unit, and wherein the control unit is configured to detect a location of a stylus pen from a stylus sensing signal received through the plurality of second and fourth patterns in the stylus sensing mode.
19. 19 . The electronic device of claim 12 , wherein the control unit controls the sensor unit to operate in a stylus sensing mode, wherein one ends of the plurality of second and fourth patterns are electrically open, and wherein the control unit is configured to detect a location of a stylus pen from a stylus sensing signal received through the plurality of first and third patterns in the stylus sensing mode.
20. 20 . The electronic device of claim 19 , wherein the control unit is configured to receive a first stylus sensing signal output from the plurality of first patterns and detect the location of the stylus pen in the second direction on the sensor unit, and is configured to receive a second stylus sensing signal output from the plurality of third patterns and detect the location of the stylus pen in the first direction on the sensor unit, wherein each of the first stylus sensing signals is a current signal induced by a magnetic field signal from the stylus pen, the current signal flowing in the second pattern being introduced into the first pattern by capacitive coupling formed between the first pattern and the second pattern, and wherein each of the second stylus sensing signals is a current signal induced by a magnetic field signal from the stylus pen, the current signal flowing in the fourth pattern being introduced into the third pattern by capacitive coupling formed between the third pattern and the fourth pattern.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of U.S. patent application Ser. No. 18/815,761, filed Aug. 26, 2024, which is a continuation of U.S. patent application Ser. No. 18/552,494, filed on Sep. 26, 2023, which is a U.S. National Stage Application under 35 U.S.C. § 371 of PCT Application No. PCT/KR2022/004265, filed Mar. 25, 2022, which claims priority to Korean Patent Application No. 10-2021-0052524, filed on Apr. 22, 2021, Korean Patent Application No. 10-2021-0047537, filed on Apr. 13, 2021, and Korean Patent Application No. 10-2021-0039402, filed on Mar. 26, 2021. The disclosures of each of the foregoing disclosures are incorporated herein by reference in their entireties. TECHNICAL FIELD The present disclosure relates to a multifunctional touch input device capable of detecting a touch position, driving a stylus pen, and detecting a position of the stylus pen. BACKGROUND ART FIG. 1 is a schematic view for explaining that an output voltage Vout of a capacitor voltage amplitude (CVA) is varied according to a position of a stylus pen 10 on a typical flexible display panel. Referring to FIG. 1, a reason why the output of the CVA is varied depending on the position of the pen 10 on the flexible display panel is that an impedance ratio of both sides based on the pen 10 on a sensing line is varied. Based on a major axis of the typical flexible display panel, a resistance R of a metal mesh touch sensor is approximately 1.2 k ohm, and a capacitor C is approximately 250 pF. Based on ten distributed models, at a driving frequency of 300 kHz, an impedance of the capacitor is approximately 200 times (120 ohm vs. 1/(2δ*300 k*25 pF)=21 k ohm) greater than a resistance thereof. Therefore, the capacitor is a main factor. FIG. 2 is a view for explaining through current sensing that output voltages Vout1 and Vout2 of the CVA are varied according to the position of the stylus pen 10 in FIG. 1, and FIG. 3 is a view for explaining through voltage sensing that the output voltages Vout1 and Vout2 of the CVA are varied according to the position of the stylus pen 10 in FIG. 1. Referring to FIGS. 2 and 3, the output voltages of the CVA are varied according to the position of the stylus pen 10 on the sensing line. That is, the output voltage of the CVA increases as the stylus pen 10 moves toward a sensing circuit unit 50 and decreases as the stylus pen 10 moves away from the sensing circuit unit 50. DISCLOSURE OF THE INVENTION Technical Problem The present disclosure provides a multifunctional touch input device capable of detecting a touch position, driving a stylus pen, and detecting a position of the stylus pen. The present disclosure also provides a touch input device capable of solving a limitation in which an output voltage of a sensing circuit unit is varied according to a position of a stylus pen. Technical Solution An embodiment of the present invention provides a touch input device including: a sensor unit; and a control unit configured to control the sensor unit. Here, the sensor unit includes: a first pattern extending in a first direction; a second pattern disposed adjacent to the first pattern and extending in the first direction; a third pattern extending in a second direction different from the first direction; and a fourth pattern disposed adjacent to the third pattern and extending in the second direction. Also, each of the first and second patterns is provided in plurality along the second direction, each of the third and fourth patterns is provided in plurality along the first direction, the plurality of first and third patterns have one ends electrically connected to the control unit and the other ends electrically opened, the plurality of second patterns have the other ends that are electrically connected to each other, and the plurality of fourth patterns have the other ends that are electrically connected to each other. In an embodiment of the present invention, a touch input device includes: a sensor unit; and a control unit configured to control the sensor unit. Here, the sensor unit includes: a first pattern including first-a and first-b patterns alternately arranged in a first direction; a second pattern disposed adjacent to the first pattern; a third pattern extending in a second direction different from the first direction; and a fourth pattern disposed adjacent to the third pattern and extending in the second direction. Also, the first-a patterns are electrically connected to each other, and the first-b patterns are electrically connected to each other, each of the first and second patterns is provided in plurality along the second direction, each of the third and fourth patterns is provided in plurality along the first direction, the plurality of first and third patterns have one ends electrically connected to the control unit and the other ends electrically opened, the plurality of second patterns have the other ends that are electrically connected to each other,