KR20220134139A - Touch input device - Google Patents

Abstract

The present invention relates to a multifunctional touch input device capable of detecting a touch position, driving a stylus pen, and detecting the position of the stylus pen. The touch input device according to an embodiment of the present invention comprises a sensor unit and a control unit for controlling the sensor unit. The sensor unit includes a plurality of patterns. The plurality of patterns includes a first pattern extending in a first direction, a second pattern disposed inside the first pattern, a third pattern extending in a second direction perpendicular to the first direction, and a fourth pattern disposed inside the third pattern. Other ends of the plurality of first patterns are electrically connected to each other, and other ends of the third patterns are electrically connected to each other.

Description

Touch input device {TOUCH INPUT DEVICE}

The present invention relates to a multifunctional touch input device capable of detecting a touch position, driving a stylus pen, and detecting the position of the stylus pen.

1 is a schematic diagram for explaining that the output voltage (Vout) of the CVA (Capacitor Voltage Amplitude) is changed according to the position of the stylus pen 10 on the conventional flexible display panel.

Referring to FIG. 1 , the reason that the CVA output is different depending on the position of the pen 10 on the flexible display panel is that the impedance ratio of both sides of the pen 10 centered on the sensing line is different.

Based on the long axis of the conventional flexible display panel, the resistance (R) of the metal mesh touch sensor is about 1.2k (ohm), and the capacitor (C) is about 250pF.

Based on 10 distributed models, at a driving frequency of 300 kHz, the impedance of a capacitor is approximately 200 times that of a resistor (120 (ohm) vs. 1/(2ð*300k*25pF) = 21k (ohm) )) larger. Therefore, the capacitor (capacitor) is the main cause.

FIG. 2 is a diagram for explaining through current sensing that the output voltages Vout1 and Vout2 of the CVA are different depending on the position of the pen 10 in FIG. 1 , and FIG. 3 is the pen 10 in FIG. 1 . It is a diagram for explaining through voltage sensing that the output voltages Vout1 and Vout2 of the CVA are different depending on the position of the CVA.

2 and 3 , the output voltage of the CVA varies according to the position of the pen 10 on the sensing line. That is, the closer the pen 10 is to the sensing circuit unit 50, the greater the CVA output voltage, and the farther it is from the sensing circuit unit 50, the smaller the CVA output voltage.

SUMMARY OF THE INVENTION An object of the present invention is to provide a multifunctional touch input device capable of detecting a touch position, driving a stylus pen, and detecting a position of the stylus pen.

In addition, there is provided a touch input device capable of solving a problem that an output voltage of a sensing circuit unit varies according to a position of a stylus pen.

A touch input device according to an embodiment of the present invention includes a sensor unit and a control unit for controlling the sensor, wherein the sensor unit includes a plurality of patterns, wherein the plurality of patterns extend in a first direction a pattern, a second pattern disposed inside the first pattern, a third pattern extending in a second direction perpendicular to the first direction, and a fourth pattern disposed inside the third pattern, Other ends of the first patterns are electrically connected to each other, and other ends of the third patterns are electrically connected to each other.

When the touch input device according to the embodiment of the present invention is used, there is an advantage of detecting the touch position, driving the stylus pen, and detecting the position of the stylus pen.

In addition, there is an advantage in that it is possible to solve the problem that the output voltage of the sensing circuit unit varies according to the position of the stylus pen.

1 is a schematic diagram for explaining that the output voltage (Vout) of the CVA (Capacitor Voltage Amplitude) is changed according to the position of the stylus pen 10 on the conventional flexible display panel.
FIG. 2 is a diagram for explaining through current sensing that the output voltages Vout1 and Vout2 of the CVA are different according to the position of the pen 10 in FIG. 1 .
FIG. 3 is a diagram for explaining through voltage sensing that the output voltages Vout1 and Vout2 of the CVA are different according to the position of the pen 10 in FIG. 1 .
4 is a schematic diagram of a touch input device according to an embodiment of the present invention.
FIG. 5 is a diagram illustrating a case in which the touch input device illustrated in FIG. 4 operates in a touch sensing mode (or a 2D sensing mode).
FIG. 6 is a diagram illustrating a case in which the touch input device illustrated in FIG. 4 operates in an antenna driving mode (or a stylus driving mode, or a stylus uplink mode).
7 is a diagram illustrating a case in which the touch input device illustrated in FIG. 4 operates in a stylus sensing mode (or a stylus downlink mode).
8A to 8E are diagrams for schematically explaining an operation principle of the stylus sensing mode of FIG. 7 .
9 is a schematic diagram of a touch input device according to another embodiment of the present invention.
FIG. 10 is a diagram illustrating a case in which the touch input device shown in FIG. 9 operates in a touch sensing mode (or a 2D sensing mode).
11 is a diagram illustrating a case in which the touch input device illustrated in FIG. 9 operates in an antenna driving mode (or a stylus driving mode, or a stylus uplink mode).
12 is a diagram illustrating a case in which the touch input device illustrated in FIG. 9 operates in a stylus sensing mode (or a stylus downlink mode).
13 is a schematic diagram of a touch input device according to still another embodiment of the present invention.
14 is a diagram illustrating a case in which the touch input device illustrated in FIG. 13 operates in a touch sensing mode (or a 2D sensing mode).
15 is a diagram illustrating a case in which the touch input device illustrated in FIG. 13 operates in an antenna driving mode (or a stylus driving mode, or a stylus uplink mode).
16 is a diagram illustrating a case in which the touch input device illustrated in FIG. 13 operates in a stylus sensing mode (or a stylus downlink mode).
17 is a table comparing characteristics of various embodiments shown in FIGS. 4, 9 and 13 .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0010] BRIEF DESCRIPTION OF THE DRAWINGS Reference is made to the accompanying drawings, which show by way of illustration specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be embodied in other embodiments without departing from the spirit and scope of the invention with respect to one embodiment. In addition, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the detailed description set forth below is not intended to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all scope equivalents to those claimed. Like reference numerals in the drawings refer to the same or similar functions throughout the various aspects.

A touch input device according to various embodiments of the present disclosure is an electronic device, for example, a smartphone, a tablet personal computer (PC), a vehicle display device, a mobile phone, a video phone, It may include at least one of an e-book reader, a laptop personal computer, a netbook computer, a mobile medical device, a camera, or a wearable device. Here, the wearable device may be an accessory type (eg, watch, ring, bracelet, anklet, necklace, eyeglasses, contact lens, or head-mounted-device (HMD)), a textile or an integrated garment (eg, electronic garment). ), a body attachable type (eg, a skin pad or a tattoo), or a bioimplantable type (eg, an implantable circuit).

Hereinafter, various embodiments will be described in detail with reference to the accompanying drawings.

4 is a schematic diagram of a touch input device according to an embodiment of the present invention.

Referring to FIG. 4 , the touch input device according to an embodiment of the present invention includes a sensor unit 100 and a control unit 500 .

The sensor unit 100 includes a plurality of patterns (or a plurality of electrodes).

The sensor unit 100 may include a plurality of first to fourth patterns 101 , 102 , 103 , and 104 .

The first pattern 101 has a shape extending along the first direction (or long axis).

The first pattern 101 may include a plurality of diamond pattern portions and a connection pattern portion connecting two diamond pattern portions adjacent to each other among the plurality of diamond pattern portions.

The first pattern 101 may have an opening in which the second pattern 102 is disposed.

The first pattern 101 may have a structure surrounding the second pattern 102 . The first pattern 101 is disposed at a predetermined distance from the second pattern 102 . In this way, they are electrically isolated from each other.

The second pattern 102 is disposed inside the first pattern 101 .

The second pattern 102 may include a plurality of diamond pattern portions and a connection pattern portion connecting two diamond pattern portions adjacent to each other among the plurality of diamond pattern portions.

A plurality of the first pattern 101 and the second pattern 102 are disposed parallel to each other.

One ends of the plurality of first patterns 101 are electrically connected to the control unit 500, and the other ends are electrically open.

One end of the plurality of second patterns 102 is electrically connected to the controller 500, and the other ends are electrically connected to each other through a conductive trace. Here, the other terminals electrically connected to each other may be grounded. When the other ends of the plurality of second patterns 102 are electrically connected to each other, capacitance for each second pattern 102 is added, so that the overall impedance is reduced, and the other ends of the plurality of second patterns 102 are grounded. will have a similar effect to

The first pattern 101 and the second pattern 102 may be disposed on the same layer. The first pattern 101 and the second pattern 102 may be formed on the same layer by using a metal mesh.

The third pattern 103 has a shape extending along the second direction (or minor axis).

The third pattern 103 may include a plurality of diamond pattern portions and a connection pattern portion connecting two diamond pattern portions adjacent to each other among the plurality of diamond pattern portions.

The third pattern 103 may have an opening in which the fourth pattern 104 is disposed.

The third pattern 103 may have a structure surrounding the fourth pattern 104 . The third pattern 103 is disposed at a predetermined distance from the fourth pattern 104 . In this way, they are electrically isolated from each other.

The fourth pattern 104 is disposed inside the third pattern 103 .

The fourth pattern 104 may include a plurality of diamond pattern portions and a connection pattern portion connecting two diamond pattern portions adjacent to each other among the plurality of diamond pattern portions.

A plurality of third patterns 103 and fourth patterns 104 are disposed parallel to each other.

One end of the plurality of third patterns 103 is electrically connected to the control unit 500, and the other ends are electrically open.

One ends of the plurality of fourth patterns 104 are electrically openly connected, and the other ends of the plurality of fourth patterns 104 are electrically connected to each other through conductive traces. Here, the other terminals electrically connected to each other may be grounded. When the other ends of the plurality of fourth patterns 104 are electrically connected to each other, capacitance for each fourth pattern 104 is added, so that the overall impedance is reduced, and the other ends of the plurality of fourth patterns 104 are grounded. will have a similar effect to

The third pattern 103 and the fourth pattern 104 may be disposed on the same layer. The third pattern 103 and the fourth pattern 104 may be formed on the same layer by using a metal mesh.

The first pattern 101 and the second pattern 102 may be disposed on a first layer, and the third pattern 103 and the fourth pattern 104 may be disposed on a second layer different from the first layer.

The control unit 500 is electrically connected to the sensor unit 100 and controls the sensor unit 100 . The control unit 500 and the sensor unit 100 may be electrically connected to each other through conductive traces.

The controller 500 may include a plurality of driving circuit units and a plurality of sensing circuit units.

The plurality of driving circuit units may include a driving circuit unit for sensing a touch and a driving circuit unit for driving the stylus.

The plurality of sensing circuit units may include a sensing circuit unit for sensing a touch and a sensing circuit unit for sensing a stylus. Here, some of the sensing circuit units may also perform touch sensing and stylus sensing.

The controller 500 may control the sensor unit 100 to operate in any one of a touch sensing mode, an antenna driving mode, and a stylus sensing mode.

The control unit 500 may connect a plurality of driving/sensing circuit units to the sensor unit 100 according to each mode. To this end, the control unit 500 may include a plurality of switches for electrically connecting the plurality of driving/sensing circuit units and the sensor unit 100 .

Hereinafter, each mode will be described with reference to FIGS. 5 to 7 .

FIG. 5 is a diagram illustrating a case in which the touch input device illustrated in FIG. 4 operates in a touch sensing mode (or a 2D sensing mode).

4 and 5 , in the touch sensing mode, the control unit 500 may electrically connect the driving circuit unit for touch sensing to the first pattern 101 of the sensor unit 100 . One driving circuit unit may be electrically connected to each of the plurality of first patterns 101 .

Also, the controller 500 may electrically connect the sensing circuit unit for touch sensing to the third pattern 103 of the sensor unit 100 . One sensing circuit unit may be electrically connected to each of the plurality of third patterns 103 .

In the touch sensing mode, the controller 500 applies a driving signal for touch sensing to the plurality of first patterns 101 and receives sensing signals received from the plurality of third patterns 103 . The sensing circuit unit of the control unit 500 electrically connected to the plurality of third patterns 103 may output capacitance change amount information included in an input sensing signal to a predetermined voltage value. The controller 500 may detect the touch position by processing the output voltage value.

In FIG. 5 , the control unit 500 is not electrically connected to the plurality of second patterns 102 , but capacitive coupling occurs between the first pattern 101 and the second pattern 102 . To prevent this from happening, one driving circuit unit may be connected to each second pattern 102 . In this case, the control unit 500 may control so that the same driving signal is applied to the plurality of first patterns 101 and the plurality of second patterns 102 . Alternatively, the controller 500 may control the reference potential to be applied to the plurality of second patterns 102 .

FIG. 6 is a diagram illustrating a case in which the touch input device illustrated in FIG. 4 operates in an antenna driving mode (or a stylus driving mode, or a stylus uplink mode).

4 and 6 , in the antenna driving mode, the control unit 500 may electrically connect the driving circuit unit for driving the antenna to the second pattern 102 of the sensor unit 100 . One driving circuit unit may be electrically connected to each of the plurality of second patterns 102 .

The controller 500 may control a driving signal output from each driving circuit unit connected to the plurality of second patterns 102 . For example, the control unit 500 controls the pulse signal of a predetermined frequency to be output from the first driving circuit unit, controls so that no pulse signal is output from the second driving circuit unit, and controls the third driving circuit unit to output a pulse signal from the first driving circuit unit. A pulse signal opposite to the output pulse signal may be controlled to be output. In this case, a current loop is formed of the second pattern 102 electrically connected to the first driving circuit unit and the second pattern electrically connected to the third driving circuit unit. A magnetic field is generated by the formed current loop, and a stylus pen adjacent thereto may be resonated and driven by the magnetic field.

The controller 500 may control to output opposite pulse signals from any two driving circuit units among the plurality of driving circuit units electrically connected to the plurality of second patterns 102 . Accordingly, the controller 500 may change and set the size or position of the current loop in various ways. For example, when the control unit 500 detects the position of the stylus pen that is close to it, the driving circuit unit electrically connected to the two second patterns around the position of the stylus pen can control to output opposite pulse signals, When the position of the stylus pen is not detected, the driving circuit unit electrically connected to the two second patterns located on both sides of the plurality of second patterns 102 may be controlled to output opposite pulse signals.

Meanwhile, although not illustrated in a separate drawing, the controller 500 may control the driving signal to be applied to the plurality of first patterns 101 or the plurality of third patterns 103 . In this case, there is an advantage in that the total number of channels can be reduced.

7 is a diagram illustrating a case in which the touch input device illustrated in FIG. 4 operates in a stylus sensing mode (or a stylus downlink mode).

4 and 7 , in the stylus sensing mode, the control unit 500 electrically connects the sensing circuit unit for stylus sensing to the first pattern 101 and the third pattern 103 of the sensor unit 100, respectively. can do it

The touch input device according to the embodiment of the present invention has an advantage that the output voltage value of the sensing circuit unit hardly changes according to the position of the stylus pen on the sensor unit 100 in the stylus sensing mode. A specific principle for this will be described with reference to FIG. 8 .

8A to 8E are diagrams for schematically explaining an operation principle of the stylus sensing mode of FIG. 7 .

8 (a) is a circuit diagram schematically illustrating an arbitrary first pattern 101, and FIG. 8 (b) is a schematic diagram of a second pattern 102 closest to the arbitrary first pattern 101. It is a circuit diagram shown as

FIG. 8(c) is a voltage distribution graph in the circuit diagram of FIG. 8(a), and FIG. 8(d) is a voltage distribution graph in the circuit diagram of FIG. 8(b).

Referring to (a) and (c) of FIG. 8 , when the stylus pen approaches any point A as far away from the sensing circuit as possible on the first pattern 101, the signal emitted from the stylus pen at the point A An induced voltage (Vemf, hereinafter referred to as an 'induced voltage') is generated.

When the induced voltage Vemf is generated at the point A, since the impedance of the equivalent capacitor C of the first pattern 101 is large, the induced voltage Vemf is mostly applied to both ends of the equivalent capacitor C. Accordingly, a voltage close to 0 (V) is applied to the right side of point A, so that almost no current flows, and -Vemf is applied to the left side of point A. In addition, the voltage close to 0 (V) on the right side of the point A gradually drops by the equivalent resistance (1.2 K (ohm)) of the first pattern 101, so that almost no voltage is applied to the input terminal of the sensing circuit part.

Referring to (b) and (d) of FIG. 8 , when the induced voltage Vemf is generated at the point A, the other ends of the second patterns 102 are electrically connected to each other on the left side of the point A, so that the impedance is almost zero. As it gets closer to , 0(V) is applied, and Vemf is applied to the right of point A. Vemf hung on the right side of point A gradually drops by the equivalent resistance (1.2K (ohm)) of the second pattern 102 .

Comparing (c) and (d) of FIG. 8 , it can be confirmed that a potential difference as much as Vemf exists between the first pattern 101 and the second pattern 102 at any position. The potential difference of Vemf between the first pattern 101 and the second pattern 102 causes a capacitive coupling between the first pattern 101 and the second pattern 102, and Accordingly, as shown in (e) of FIG. 8 , the current induced in the second pattern 102 flows to the first pattern 101 . Accordingly, when the position of the stylus pen is far from the sensing circuit unit, the current generated in the first pattern 101 itself is small, but since the current from the second pattern 102 is added, the controller 500 controls the first pattern The position of the stylus pen may be sensed through a sensing circuit unit electrically connected to 101 .

And, as can be seen from (a) to (e) of Figure 8, even if point A moves to the left or right, it can be seen that the potential difference between the first pattern 101 and the second pattern 102 is constant as Vemf. can Accordingly, regardless of the position of the stylus pen on the sensor unit 100 , the controller 500 may sense the stylus pen from a constant signal output from the sensing circuit unit.

The present inventors confirmed that the current flowing from the second pattern 102 to the first pattern 101 is the same even when the point B is opened in (b) of FIG. 8 . This means that when the part corresponding to point B in FIG. 8(b) is opened, the point B from point A is constant as Vemf regardless of the equivalent resistance (1.2K(ohm)) of the second pattern 102 . This is because the voltage is maintained. This characteristic corresponds to opening one end of each of the second patterns 102 in the embodiment of FIG. 4 .

Although it has been described that the current flowing from the second pattern 102 to the first pattern 101 is due to capacitive coupling in the description of FIG. 8E , the present invention is not limited thereto. For example, the current flowing from the second pattern 102 to the first pattern 101 is also possible by magnetic coupling (magnetic field coupling).

Again, referring to FIGS. 4 and 7 , in the stylus sensing mode, when the stylus pen approaches an arbitrary position of the sensor unit 100, a predetermined signal is output from the stylus pen, and the first to first An induced voltage is generated in the fourth patterns 101 , 102 , 103 , and 104 .

When the stylus pen is located far from the control unit 500 , little current flows in the first pattern 101 itself, but the second pattern 102 Since the current flows into the first pattern 101 , the controller 500 may detect the position of the stylus pen through the sensing circuit unit electrically connected to the first pattern 101 . Here, when the current flows from the second pattern 102 to the first pattern 101 , a potential difference equal to the induced voltage is generated between the first pattern 101 and the second pattern 102 , and the generated potential difference This is due to capacitive coupling between the first pattern 101 and the second pattern 102 .

Similarly, although little current flows in the third pattern 103 itself, current flows from the fourth pattern 104 to the third pattern 103 , so the controller 500 is electrically connected to the third pattern 103 . The position of the stylus pen may be detected through the sensing circuit unit.

On the other hand, although not shown in the drawings, unlike FIG. 7 , the control unit 500 electrically connects the sensing circuit units to the plurality of second patterns 102 or the plurality of fourth patterns 104 to detect the position of the stylus pen. You may.

9 is a schematic diagram of a touch input device according to another embodiment of the present invention.

Referring to FIG. 9 , a touch input device according to another embodiment of the present invention includes a sensor unit 100 ′ and a control unit 500 ′.

The sensor unit 100' includes a plurality of patterns. The plurality of patterns may include a 1a pattern 101a , a 1b pattern 101b , a 2a pattern 102a , a 2b pattern 102b , a third pattern 103 , and a fourth pattern 104 . . Here, the third pattern 103 and the fourth pattern 104 have the same configuration of the third and fourth pattern units 103 and 104 of the sensor unit 100 shown in FIG. 4 , and thus a description thereof will be omitted. do.

The 1a pattern 101a has a shape extending along the first direction (or long axis).

The 1a pattern 101a may include an inverted triangle pattern part, a triangular pattern part, and a connection pattern part connecting the inverted triangle pattern part and the triangular pattern part.

The 1a pattern 101a may have an opening in which the 2a pattern 102a is disposed.

The 1a pattern 101a may have a structure surrounding the 2a pattern 102a. The 1a pattern 101a is spaced apart from the 2a pattern 102a by a predetermined distance. In this way, they are electrically isolated from each other.

The second a pattern 102a is disposed inside the first a pattern 101a.

The 2a pattern 102a may include an inverted triangle pattern part, a triangular pattern part, and a connection pattern part connecting the inverted triangle pattern part and the triangular pattern part.

The 1b pattern 101b has a shape extending along the first direction (or long axis).

The 1b pattern 101b may include an inverted triangle pattern part, a triangular pattern part, and a connection pattern part connecting the inverted triangle pattern part and the triangular pattern part.

The 1b pattern 101b may have an opening in which the 2b pattern 102b is disposed.

The first b pattern 101b may have a structure surrounding the second b pattern 102b. The first b pattern 101b is disposed at a predetermined distance from the second b pattern 102b. In this way, they are electrically isolated from each other.

The 2b pattern 102b is disposed inside the 1b pattern 101b.

The second b pattern 102b may include an inverted triangular pattern unit, a triangular pattern unit, and a connection pattern unit connecting the inverted triangular pattern unit and the triangular pattern unit.

The plurality of 1a patterns 101a and the plurality of 1b patterns 101b are alternately disposed along the first direction, the plurality of 1a patterns 101a are electrically connected to each other, and the plurality of 1b patterns ( 101b) are also electrically connected to each other.

The 1a pattern 101a located at one end of the plurality of 1a patterns 101a is electrically connected to the controller 500 ′.

The 1b pattern 101b located at one end of the plurality of 1b patterns 101b is electrically connected to the controller 500 ′.

The plurality of 2a patterns 102a and the plurality of 2b patterns 102b are alternately disposed along the first direction and electrically connected to each other. Among the plurality of 2a patterns 102a and the plurality of 2b patterns 102b, a 2b pattern 102b located at one end is electrically connected to the control unit 500, and a second 2a pattern 102a located at the other end. ) may be electrically connected to other adjacent 2a patterns. Here, the other 2a patterns adjacent to the 2a pattern 102a located at the other end may be adjacent to each other.

The 1a pattern 101a, the 1b pattern 101b, the 2a pattern 102a, and the 2b pattern 102b may be disposed on the same layer. The 1a pattern 101a, the 1b pattern 101b, the 2a pattern 102a, and the 2b pattern 102b may be formed on the same layer by using a metal mesh.

The control unit 500 ′ has the same function as the control unit 500 illustrated in FIG. 4 .

FIG. 10 is a diagram illustrating a case in which the touch input device shown in FIG. 9 operates in a touch sensing mode (or a 2D sensing mode).

9 and 10 , in the touch sensing mode, the controller 500 ′ may electrically connect the driving circuit for touch sensing to the third pattern 103 of the sensor unit 100 ′. One driving circuit unit may be electrically connected to each of the plurality of third patterns 103 .

Also, the controller 500 ′ may electrically connect the sensing circuit unit for sensing a touch to the first a and first b patterns 101a and 101b of the sensor unit 100 ′.

In the touch sensing mode, the controller 500 ′ applies a driving signal for touch sensing to the plurality of third patterns 103 , and receives sensing signals received from the plurality of first and first patterns 101a and 101b. do. The sensing circuit unit of the controller 500 ′ electrically connected to the plurality of 1a and 1b patterns 101a and 101b may output capacitance change amount information included in an input sensing signal to a predetermined voltage value. The controller 500 ′ may detect the touch position by processing the output voltage value. Here, the controller 500 ′ may cancel the display noise and LGM noise by subtracting the detection signal received from the 1b pattern 101b from the detection signal received from the 1a pattern 101a .

Here, so that capacitive coupling between the third pattern 103 and the fourth pattern 104 does not occur, the controller 500 ′ controls the plurality of third patterns 103 and the plurality of fourth patterns. The same driving signal may be applied to the pattern 104 . Alternatively, the controller 500 ′ may control the reference potential to be applied to the plurality of fourth patterns 104 .

11 is a diagram illustrating a case in which the touch input device illustrated in FIG. 9 operates in an antenna driving mode (or a stylus driving mode, or a stylus uplink mode).

9 and 11 , in the antenna driving mode, the control unit 500 ′ electrically connects the driving circuit unit for driving the antenna to the second a and second b patterns 102a and 102b of the sensor unit 100 ′. can

The controller 500 ′ may control a driving signal output from each driving circuit unit connected to the plurality of seconda and secondb patterns 102a and 102b. For example, the control unit 500 ′ controls the pulse signal of a predetermined frequency to be output from the first driving circuit unit, controls that no pulse signal is output from the second driving circuit unit, and controls the third driving circuit unit to output the first driving circuit unit. It is possible to control so that a pulse signal opposite to the pulse signal output from is output. In this case, a current loop is formed of the second a and second b patterns 102a and 102b electrically connected to the first driving circuit unit and the second a and second b patterns electrically connected to the third driving circuit unit. A magnetic field is generated by the formed current loop, and a stylus pen adjacent thereto may be resonated and driven by the magnetic field.

The controller 500 ′ may control to output opposite pulse signals to any two driving circuit units among a plurality of driving circuit units electrically connected to the plurality of second a and second b patterns 102a and 102b. Accordingly, the controller 500 ′ may change and set the size or position of the current loop in various ways. For example, when the control unit 500 ′ detects the position of the stylus pen that is close to it, the driving circuit unit electrically connected to the two second patterns around the position of the stylus pen can control to output opposite pulse signals, and , when the position of the stylus pen is not detected, the driving circuit unit electrically connected to the two second a and second b patterns 102a and 102b located on both sides of the plurality of second a and second b patterns 102a and 102b It is also possible to control so that pulse signals opposite to each other are output.

Meanwhile, although not shown in a separate drawing, the controller 500 ′ may control the driving signal to be applied to the plurality of first a pattern 101a , or the first b pattern 101b , or the third pattern 103 . . In this case, there is an advantage in that the total number of channels can be reduced.

12 is a diagram illustrating a case in which the touch input device illustrated in FIG. 9 operates in a stylus sensing mode (or a stylus downlink mode).

9 and 12 , in the stylus sensing mode, the control unit 500 ′ includes the sensing circuit unit for stylus sensing of the first and second patterns 101a and 101b and the third pattern ( 103) can be electrically connected to each.

In the stylus sensing mode, when the stylus pen approaches an arbitrary position of the sensor unit 100', a predetermined signal is outputted from the stylus pen, An induced voltage is generated in the first, second, second, third, and fourth patterns 101a, 101b, 102a, 102b, 103, and 104 .

Here, when the stylus pen is located far from the control unit 500 ′, little current flows in the plurality of first a patterns 101a itself due to the generation of an induced voltage, but the plurality of second a patterns 102a Since current flows from the , the controller 500 ′ may detect the position of the stylus pen through a sensing circuit unit electrically connected to the plurality of first a patterns 101a. Here, when the current flows from the 2a pattern 102a to the 1a pattern 101a, a potential difference equal to the induced voltage is generated between the 1a pattern 101a and the 2a pattern 102a, and the generated potential difference This is due to the capacitive coupling between the 1a pattern 101a and the 2a pattern 102a by

Similarly, little current flows in the plurality of first b patterns 101b itself, but current flows from the plurality of second b patterns 102b, so that the controller 500 ′ operates with the plurality of first b patterns 101b and The position of the stylus pen may be detected through the electrically connected sensing circuit unit.

Similarly, little current flows in the third pattern 103 itself, but current flows from the fourth pattern 104 , so the controller 500 ′ controls the stylus pen through a sensing circuit electrically connected to the third pattern 103 . position can be detected.

On the other hand, although not shown in the drawings, unlike in FIG. 12 , the control unit 500 ′ electrically connects the sensing circuit units to the plurality of second a pattern 102a , or the second b pattern 102b , or the fourth pattern 104 . to detect the position of the stylus pen.

13 is a schematic diagram of a touch input device according to still another embodiment of the present invention.

The sensor unit 100 ″ of the touch input device illustrated in FIG. 13 , compared to the sensor unit 100 ″ illustrated in FIG. 9 , 1a, 1b, 2a, 2b, third, and third The structure of the 4 patterns is the same. The difference is that the 1b pattern located on one side (lower side) of the plurality of 1b patterns 101b electrically connected to each other along the first direction is electrically connected to the control unit 500'' through a conductive trace, The point is that the 1a pattern 101a located on the other side (upper side) among the plurality of 1a patterns 101a electrically connected to each other along the first direction is electrically connected to the controller 500'' through a conductive trace. .

14 is a diagram illustrating a case in which the touch input device illustrated in FIG. 13 operates in a touch sensing mode (or a 2D sensing mode).

Since the description of the touch sensing mode is the same as that described with reference to FIG. 10 , it will be omitted.

15 is a diagram illustrating a case in which the touch input device illustrated in FIG. 13 operates in an antenna driving mode (or a stylus driving mode, or a stylus uplink mode).

The description of the antenna driving mode is the same as that described with reference to FIG. 11, and thus is omitted.

16 is a diagram illustrating a case in which the touch input device illustrated in FIG. 13 operates in a stylus sensing mode (or a stylus downlink mode).

The stylus sensing mode of FIG. 16 is different from the stylus sensing mode of FIG. 14 .

When the stylus pen approaches an arbitrary position on the sensor unit 100'' and then is driven and a signal is emitted from the stylus pen, a predetermined signal is output from the stylus pen, and 1a, 1b, and 2a , 2b, third, and fourth patterns 101a, 101b, 102a, 102b, 103, and 104 are induced voltages.

Here, when the stylus pen is located far from the controller 500 ′, little current flows in the plurality of first b patterns 101b itself due to the generation of an induced voltage, but the plurality of second b patterns 102b In addition, since current flows from the plurality of 1a patterns 101a, the control unit 500' can detect the position of the stylus pen through a sensing circuit unit electrically connected to the plurality of 1b patterns 101b. . Here, the current flowing from the 2b pattern 102b and the 1a patterns 101a to the 1b pattern 101b is between the 1b pattern 101b and the 2b pattern 102b and the 1b pattern 101b. ) and the 1a pattern 101a, a potential difference equal to the induced voltage is generated, and capacitive coupling between the 1b pattern 101b and the 2b pattern 102b and the 1b pattern by the generated potential difference This is due to capacitive coupling between 101b and the 1a pattern 101a.

Here, the reason the current flows from the 1a pattern 101a to the 1b pattern 101b is that, unlike FIG. 12 , a relatively large amount of current flows in the plurality of 1a patterns 101a themselves. This is because the direction of the conductive traces connected to the plurality of 1a patterns 101a is opposite to the direction of the conductive traces connected to the plurality of 1b patterns 101b. In other words, when the stylus pen is positioned far from the sensing circuit unit connected to the plurality of first b patterns 101b, the corresponding stylus pen is positioned closer to the sensing circuit unit connected to the plurality of first patterns 101a. Because.

Similarly, little current flows in the third pattern 103 itself, but current flows from the fourth pattern 104 , so the controller 500 ′ controls the stylus pen through a sensing circuit electrically connected to the third pattern 103 . position can be detected.

On the other hand, although not shown in the drawings, unlike in FIG. 16 , the control unit 500 ″ electrically connects the sensing circuit units with a plurality of second a pattern 102a , second b pattern 102b , or fourth pattern 104 . It can also be connected to detect the position of the stylus pen.

17 is a table comparing characteristics of various embodiments shown in FIGS. 4, 9 and 13 .

Referring to FIG. 17 , in the embodiment of FIG. 4 , a total of 70 to 80 channels can be configured. Specifically, the driving electrode TX used in the touch sensing mode may be configured with 20 channels, the receiving electrode RX may be configured with 40 channels, and the antenna driving electrode TX used in the antenna driving mode may be configured with 10 to 20 channels. Here, when the antenna driving mode consists of 10 channels, it means that two channels adjacent to each other are connected in parallel.

In addition, in the embodiment of FIG. 4 , 20 left conductive traces and 20 right traces may be configured along the second direction (short axis). Accordingly, the width of the bezel of the touch input device may be maintained as before.

9, a total of 90 to 100 channels can be configured. Specifically, the driving electrode TX used in the touch sensing mode may be configured with 40 channels, the receiving electrode RX may be configured with 40 channels, and the antenna driving electrode TX used in the antenna driving mode may be configured with 10 to 20 channels. Here, when the antenna driving mode consists of 10 channels, it means that two channels adjacent to each other are connected in parallel.

Also, in the embodiment of FIG. 9 , 20 left conductive traces and 20 right traces may be configured along the second direction (short axis). Accordingly, the width of the bezel of the touch input device may be maintained as before.

In the embodiment of FIG. 13 , a total of 90 to 100 channels can be configured. Specifically, the driving electrode TX used in the touch sensing mode may be configured with 40 channels, the receiving electrode RX may be configured with 40 channels, and the antenna driving electrode TX used in the antenna driving mode may be configured with 10 to 20 channels. Here, when the antenna driving mode consists of 10 channels, it means that two channels adjacent to each other are connected in parallel.

In addition, in the embodiment of FIG. 13 , 30 left conductive traces and 30 right traces may be configured along the second direction (short axis).

Features, structures, effects, etc. described in the above embodiments are included in one embodiment of the present invention, and are not necessarily limited to one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified for other embodiments by those of ordinary skill in the art to which the embodiments belong. Accordingly, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

In addition, although the embodiment has been mainly described in the above, this is only an example and does not limit the present invention, and those of ordinary skill in the art to which the present invention pertains in the range that does not deviate from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications not illustrated are possible. For example, each component specifically shown in the embodiment can be implemented by deformation|transformation. And the differences related to these modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

Claims (11)

sensor unit; and a control unit for controlling the sensor unit;
The sensor unit,
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
and a fourth pattern disposed adjacent to the third pattern and extending in the second direction;
The first and second patterns are arranged in plurality along the second direction,
The third and fourth patterns are arranged in plurality along the first direction,
One ends of the plurality of first and third patterns are electrically connected to the control unit, and the other ends are electrically open,
The other ends of the plurality of second patterns are electrically connected to each other,
The other ends of the plurality of fourth patterns are electrically connected to each other,
touch input device. sensor unit; and a control unit for controlling the sensor unit;
The sensor unit,
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
and a fourth pattern disposed adjacent to the third pattern and extending in the second direction;
The 1a patterns are electrically connected to each other, and the 1b patterns are electrically connected to each other,
The first and second patterns are arranged in plurality along the second direction,
The third and fourth patterns are arranged in plurality along the first direction,
The plurality of first and third patterns are electrically connected to the control unit, and the other ends are electrically open,
The other ends of the plurality of second patterns are electrically connected to each other,
The other ends of the plurality of fourth patterns are electrically connected to each other,
touch input device. 3. The method of claim 2,
The 1a patterns and the 1b patterns are connected to the control unit,
The control unit controls the sensor unit to operate in a touch sensing mode,
The control unit detects a touch position based on a signal obtained by subtracting a first detection signal received from the first a patterns and a second detection signal received from the first b patterns in the touch sensing mode, a touch input device . 4. The method according to claim 2 or 3,
Among the 1a patterns arranged in the first direction, a 1a pattern furthest from the control unit is connected to the control unit,
A touch input device, wherein a 1b pattern disposed closest to the control unit among the 1b patterns arranged in the first direction is connected to the control unit. 3. The method according to claim 1 or 2,
The first pattern has an opening in which the second pattern is disposed,
The third pattern has an opening in which the fourth pattern is disposed. 3. The method according to claim 1 or 2,
The control unit controls the sensor unit to operate in any one of a touch sensing mode, a stylus driving mode, and a stylus sensing mode, a touch input device. 7. The method of claim 6,
One ends of the plurality of second patterns are connected to the control unit,
The control unit applies a stylus driving signal to at least one of the plurality of second patterns in a stylus driving mode of the sensor unit, the touch input device. 7. The method of claim 6,
One ends of the plurality of second patterns are electrically open,
The control unit applies a stylus driving signal to at least one of the plurality of first patterns in a stylus driving mode of the sensor unit, the touch input device. 7. The method of claim 6,
One ends of the plurality of second and fourth patterns are connected to the control unit,
The control unit detects the position of the stylus pen from the stylus sensing signal received through the plurality of second and fourth patterns in the stylus sensing mode of the sensor unit, the touch input device. 7. The method of claim 6,
One ends of the plurality of second and fourth patterns are electrically open,
The control unit detects the position of the stylus pen from the stylus sensing signal received through the plurality of first and third patterns in the stylus sensing mode of the sensor unit, the touch input device. 3. The method according to claim 1 or 2,
The plurality of first and second patterns are disposed on different layers from the plurality of third and fourth patterns. touch input device.

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