KR102246905B1 - Coordinate indicating apparatus and coordinate indicating system having the same - Google Patents

Abstract

A coordinate measuring device is disclosed. The coordinate measuring apparatus includes a channel electrode unit including a plurality of electrodes, a driving unit that generates a driving signal and provides a driving signal to the channel electrode unit, and receives a first received signal for detecting a change in capacitance from some of the plurality of electrodes. A receiver configured to receive a second received signal corresponding to a signal transmitted from the coordinate display device from another part of the electrode, and the position of at least one of the hand and the coordinate display device based on the received first and second received signals. It includes a processor to determine.

Description

Coordinate measuring device and coordinate measuring system equipped with the same {COORDINATE INDICATING APPARATUS AND COORDINATE INDICATING SYSTEM HAVING THE SAME}

The present disclosure relates to a coordinate measuring device and a coordinate measuring system including the same, and more particularly, to a coordinate measuring device and a coordinate measuring system capable of measuring the position of a user's hand touch and a stylus pen together.

Recently, the spread of smart phones or tablet PCs is actively progressing, and the development of technology for a built-in contact position measuring device is also actively progressing. A smartphone or tablet PC is mainly equipped with a touch screen, and a user can designate specific coordinates of the touch screen using a finger or a stylus pen. That is, the user can input a specific signal to the smartphone by designating specific coordinates of the touch screen.

Meanwhile, a conventional touch screen detects only a user's hand touch or a stylus pen's touch, but recently, a method capable of recognizing both a user's hand touch and a stylus pen touch has been adopted.

However, since the conventional method alternately detects the hand touch and the stylus pen, the hand touch and the contact between the stylus pen are not actually detected together.

The present disclosure is to provide a coordinate measuring device and a coordinate measuring system capable of measuring a user's hand touch and a position of a stylus pen together.

A coordinate measuring apparatus according to an embodiment of the present disclosure includes a channel electrode unit including a plurality of electrodes, a driving unit generating a driving signal and providing the channel electrode unit, and detecting a change in capacitance from some of the plurality of electrodes. A receiver configured to receive a second received signal corresponding to a signal transmitted from the coordinate display device from another part of the plurality of electrodes together with the reception of the first received signal, and the received first and second received signals And a processor that determines a location of at least one of a hand and a coordinate display device based on the hand and coordinate display device.

In this case, the driving unit may generate a driving signal having a frequency band different from that of the second reception signal and provide the driving signal to the channel electrode unit.

Meanwhile, the channel electrode unit includes a first electrode group including a plurality of first electrodes disposed in a first direction, and a second electrode including a plurality of second electrodes disposed in a second direction perpendicular to the first direction. An electrode group may be included, and the receiver may receive the second received signal from the second electrode group while the driver drives the first electrode group to generate the first received signal.

Meanwhile, the channel electrode unit includes a first electrode group including a plurality of first electrodes disposed in a first direction, and a second electrode including a plurality of second electrodes disposed in a second direction perpendicular to the first direction. Including an electrode group, wherein the receiving unit may receive the second received signal from the remaining part of the first electrode group while the driving unit drives a part of the first electrode group to generate the first received signal. have.

In this case, the first received signal and the second received signal may be signals of different frequency bands.

On the other hand, the receiving unit receives the first received signal and the second received signal in parallel in a plurality of channel units, and the processor, the receiving unit so that the first received signal and the second received signal are received together from different electrodes. Can be controlled.

On the other hand, the processor calculates a capacitance between each electrode at a plurality of electrode intersections using the first received signal, determines the position of the hand based on the calculated capacitance, and the ratio between the received second received signals The position of the coordinate display device may be determined based on.

Meanwhile, the driving unit generates a second driving signal for generating a signal of the coordinate display device approaching the coordinate measuring device through a combination of a first driving signal for generating a first received signal and a capacitance, and the first driving The signal and the second driving signal may be signals of different frequency bands.

In this case, the driving unit may provide each of the first driving signal and the second driving signal to different electrodes together.

Meanwhile, the second driving signal may be a signal obtained by filtering higher-order harmonics of a signal frequency.

Meanwhile, the receiving unit receives a first receiving unit that receives a first receiving signal for detecting a change in capacitance, and a second receiving signal corresponding to a signal transmitted from the coordinate display device while receiving the first receiving signal. It may include a second receiver.

In this case, the second reception unit amplifies and outputs the received second reception signal, an ADC unit that converts the amplified second reception signal into a digital signal, and a second reception converted into the digital signal. It may include a signal processor for extracting a preset frequency component from the signal.

Meanwhile, the second receiving unit includes a filter unit that filters a preset band from the received second received signal, a measurement unit that measures the magnitude of the filtered second received signal, and a frequency of the filtered second received signal. It may include an extraction unit for extracting the pen pressure information using the band.

Meanwhile, a coordinate measuring device for sensing a contact position of a coordinate display device that senses a contact position of a hand by an electrostatic method according to an embodiment of the present disclosure and generates an electrical signal for measuring the contact position, includes a plurality of electrodes The electrical signal generated from the coordinate display device together with a channel electrode unit that generates a driving signal and provides a driving signal to the channel electrode unit, and a first received signal for detecting a change in capacitance from electrodes in the channel electrode unit A receiver configured to receive a second received signal corresponding to, and a processor configured to determine a position of at least one of a hand or a coordinate display device based on the first received signal and the second received signal received from the receiver, The driving unit generates a first driving signal for detecting a change in the capacitance and a second driving signal that is an excitation signal for generating the electric signal of the touch sensing device, and the first driving signal and Each of the second driving signals is applied together to different electrodes.

In this case, the first driving signal and the second driving signal may be signals of different frequency bands.

Meanwhile, the driving unit may provide first driving signals of different digital codes for each electrode.

Meanwhile, a coordinate measuring system according to an embodiment of the present disclosure includes a coordinate measuring device including a plurality of electrodes, and a coordinate display device that transmits a response signal to at least one electrode of the coordinate measuring device, and the coordinate The measuring device generates a driving signal to detect a change in capacitance between two electrodes intersecting among the plurality of electrodes, and the coordinate display device may generate a response signal for a preset time when the driving signal is detected. .

In this case, the response signal and the driving signal may be signals of different frequency bands.

Meanwhile, the coordinate display device may generate a response signal for a preset time after detection of the driving signal is terminated.

Meanwhile, a first signal receiving unit receiving a first receiving signal for detecting a change in capacitance, and a second signal receiving unit receiving a second receiving signal for detecting the response signal, wherein the first signal The reception unit and the second signal reception unit may receive the first reception signal and the second reception signal together from different electrodes among the plurality of electrodes.

1 is a block diagram showing the configuration of a coordinate measuring system according to an embodiment of the present disclosure;
2 is a block diagram showing a specific configuration of the coordinate measuring device of FIG. 1;
3 is a diagram showing a circuit diagram of the coordinate measuring device of FIG. 1;
4 is a diagram showing a specific configuration of the receiving unit of FIG. 2;
5 to 8 are views for explaining the operation of the coordinate measuring device according to the first embodiment;
9 is a diagram showing a specific configuration of the first receiver of FIG. 4;
10 is a diagram showing a specific configuration of the second receiver of FIG. 4;
11 to 12 are views for explaining the operation of the coordinate measuring apparatus according to the second embodiment;
13 to 16 are views for explaining the operation of the coordinate measuring device according to the third embodiment;
17 to 19 are views for explaining the operation of the coordinate measuring apparatus according to the fourth embodiment;
20 is a diagram showing a specific configuration of a passive coordinate display device;
FIG. 21 is a diagram showing a circuit diagram when the coordinate display device of FIG. 20 contacts the coordinate measuring device;
22 is a diagram showing a specific configuration of an active coordinate display device according to the first embodiment;
23 is a diagram showing a specific configuration of an active coordinate display device according to a second embodiment;
24 to 27 are views for explaining the operation of the coordinate measuring apparatus according to the fifth embodiment;
28 to 31 are waveform diagrams according to various driving methods of the coordinate display device and the coordinate measurement device according to the present embodiment;
32 to 34 are diagrams for explaining the operation of the coordinate measuring apparatus according to the sixth embodiment;
35 is a flowchart illustrating a method of measuring coordinates of a coordinate measuring device according to an embodiment of the present disclosure, and
36 is a flowchart illustrating a method of controlling a coordinate display device according to an embodiment of the present disclosure.

Hereinafter, an exemplary embodiment of the present disclosure will be described in more detail with reference to the accompanying drawings. However, in describing the present disclosure, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present disclosure, a detailed description thereof will be omitted.

1 is a block diagram illustrating a configuration of a coordinate measuring system according to an embodiment of the present disclosure.

Referring to FIG. 1, the coordinate measurement system 300 may include a coordinate measurement device 100 and a coordinate display device 200.

The coordinate measuring device 100 determines the position of the user's hand 10 (specifically, a finger in contact with the coordinate measuring device). Specifically, the coordinate measuring device 100 includes a plurality of electrodes, and the user's hand on the coordinate measuring device 100 is applied by applying a driving signal to some electrodes and measuring a first received signal corresponding to the driving signal from another electrode. You can determine the location.

In addition, the coordinate measuring device 100 determines the position of the coordinate display device 200 during the process of determining the position of the hand. Specifically, the coordinate measuring apparatus 100 may determine the position of the coordinate display device on the coordinate measuring apparatus 100 by receiving a second received signal corresponding to the signal of the coordinate display apparatus 200.

Meanwhile, when the coordinate display device 200 is a device that operates in a passive manner, that is, a device that does not have its own power, the coordinate measuring device 100 applies a driving signal to some of the plurality of electrodes. , The driving signal may be transmitted to the resonance circuit of the coordinate display device 200 approaching the coordinate measuring device through capacitive coupling.

A detailed configuration and operation of the coordinate measuring apparatus 100 will be described later with reference to FIG. 2. Here, the coordinate measuring device 100 may be a touch pad, a touch screen, or an electronic device such as a laptop, a mobile phone, a smart phone, a PMP, or an MP3 player having a touch pad or a touch screen.

The coordinate display device 200 may transmit a signal to at least one electrode in the coordinate measuring device 100. The coordinate display device 200 may be implemented in the form of a stylus pen, but is not limited thereto. In addition, the coordinate display device 200 may be an active method that operates using its own power source as well as a passive type stylus pen that operates using a driving signal provided from an external device. A detailed configuration and operation of the coordinate display device 200 will be described later with reference to FIGS. 20 to 23.

As described above, the coordinate measuring system 300 according to the present exemplary embodiment receives the first received signal for detecting the position of the hand and the second received signal for detecting the position of the stylus pen at the same time or at a high speed. The position and the position of the stylus pen can be measured together.

Meanwhile, in the description of FIG. 1, it is illustrated that one coordinate display device 200 is connected to the coordinate measuring device 100, but in implementation, a plurality of coordinate display devices may be connected to one coordinate measuring device 100. In this case, the coordinate measuring device 100 may detect the positions of each of the plurality of coordinate display devices.

2 is a block diagram showing a specific configuration of the coordinate measuring apparatus of FIG. 1.

Referring to FIG. 2, the coordinate measuring apparatus 100 may include a channel electrode unit 110, a driving unit 130, a receiving unit 140, and a processor 150.

The channel electrode unit 110 includes a plurality of electrodes. Specifically, the channel electrode unit 110 may include a plurality of electrodes arranged in a matrix form. For example, the channel electrode unit 110 may include a plurality of first electrodes disposed in a first direction and a plurality of second electrodes disposed in a second direction perpendicular to the first direction. The shape and operation of the plurality of electrodes included in the channel electrode unit 110 will be described later with reference to FIG. 3.

The driving unit 130 generates a driving signal and provides it to the channel electrode unit. Specifically, the driving unit 130 may generate a first driving signal for sensing a hand touch and provide it to at least one of the electrodes of the channel electrode unit. Here, the first driving signal may have a driving frequency of 200 to 300 kHz.

Meanwhile, a driving signal may be provided to a plurality of electrodes for a faster hand detection operation. When the same driving signal is provided to a plurality of electrodes, a response signal received according to the driving signal is a driving signal applied from a certain electrode. It is impossible to tell if it is due to. Accordingly, the driving unit 130 may provide different first driving signals to the plurality of electrodes together. Specifically, the driving unit 130 may provide first driving signals having different digital codes to the plurality of electrodes. Here, the digital code may be a pulse signal having a binary value.

Meanwhile, the driving unit 130 may generate a second driving signal to be transmitted to the resonance circuit of the coordinate display device 200 that has approached the coordinate measuring device through capacitive coupling. Specifically, when the coordinate display device 200 is a stylus pen operating in a passive manner, the driving unit 130 applies a driving signal to the electrodes in the channel electrode unit 110, thereby capacitive coupling the driving signal. ) Can be transmitted to the resonance circuit of the object approached to the coordinate measuring device 100.

In this case, the driving unit 130 may apply the same second driving signal to the electrodes in the channel electrode unit 110 in units of a plurality of electrodes in order to transfer more energy to the coordinate display device 200. Here, the second driving signal is a signal having a frequency band different from that of the first driving signal and may have a driving frequency of approximately 500 kHz to 2 MHz.

For example, the driving unit 130 collectively applies the same driving signal to all of the plurality of electrodes in units of a preset period, or collectively applies the same driving signal to all of the plurality of electrodes disposed in the same direction, or The same driving signal may be collectively applied to only a few adjacent electrodes among a plurality of electrodes arranged in the direction, or the same driving signal may be collectively applied to two electrodes intersecting with each other. Such an application method is only an example, and may be implemented in a manner other than the above-described example if the driving signal is collectively applied to two or more electrodes.

Meanwhile, the above-described second driving signal may be a signal obtained by filtering higher-order harmonics of a signal frequency (or resonance frequency). Specifically, in electronic devices, generation of unnecessary noise is regulated in accordance with an Electro Magnetic Interference (EMI) standard according to frequency. However, filtering high-order harmonics reduces high-frequency noise, which is advantageous in terms of EMI.

The receiver 140 receives a first received signal for detecting a change in capacitance from some of the plurality of electrodes, and receives a second received signal corresponding to a signal transmitted from the coordinate display device from another part of the plurality of electrodes. . In more detail, the receiver 140 may receive a first reception signal from some of the electrodes to which the first driving signal is not applied, and may receive a second reception signal from another part of the electrodes to which the first driving signal is not applied. The receiving unit 140 will be described in detail with reference to FIGS. 5 to 8 for a specific receiving operation.

The processor 150 determines the position of at least one of the hand and coordinate display device 200 based on the received first and second received signals. Specifically, the processor 150 controls the driving unit 130 to apply the first driving signal to some of the plurality of electrodes, and in a state in which the first driving signal is applied, some of the remaining electrodes are different from the first received signal. The receiver 140 may be controlled so that the second received signal is received together.

In addition, the processor 150 may calculate a capacitance between the electrodes at a plurality of electrode intersections formed between the electrodes using the first received signal, and determine the position of the hand based on the calculated capacitance.

In addition, the processor 150 may determine the position of the coordinate display device 200 based on a ratio between the second received signals received from each of the plurality of electrodes. For example, when a plurality of electrodes are configured in a matrix form, a plurality of first electrodes are disposed in a first direction, and a plurality of second electrodes are disposed in a second direction perpendicular to the first direction, the processor 150 ) Determines the contact position in the second direction of the coordinate display device 200 from the ratio between the second reception signals received from the first electrodes, and displays the coordinates based on the ratio between the second reception signals received from the second electrodes The contact position of the device 200 in the first direction may be determined.

Further, the processor 150 detects a contact pressure of the coordinate display device 200 based on a change in the resonance frequency of the received second received signal, or the coordinate display device 200 based on a change in the resonance frequency of the received second received signal. ) Operation mode can be detected.

As described above, the coordinate measuring apparatus 100 according to the present embodiment receives the first received signal for detecting the position of the hand and the second received signal for detecting the position of the stylus pen at a high speed, and The position of the stylus pen can be measured together.

Although only the basic configuration of the coordinate measuring device 100 has been illustrated and described above, the coordinate measuring device 100 may further include a configuration other than the above-described configuration. For example, when the coordinate measuring device 100 is a touch screen, a display configuration may be further included, and when the coordinate measuring device 100 is a device such as a smartphone or a PMP, a display, a storage unit, and a communication configuration It may further include such as.

3 is a diagram showing a circuit diagram of the coordinate measuring apparatus of FIG. 1.

Referring to FIG. 3, the coordinate measuring apparatus 100 may include a channel electrode unit 110, a driving unit 130, a receiving unit 140, a processor 150, and a connection unit 160.

The channel electrode unit 110 includes a plurality of electrodes. Specifically, as shown in FIG. 3, the channel electrode unit 110 includes first electrode groups 111, 112, 113, 114, 115, 116 and second electrode groups 121, 122, which are disposed in different directions. 123, 124, 125, 126).

The first electrode groups 111, 112, 113, 114, 115, and 116 may include first electrodes 111, 112, 113, 114, 115, 116 disposed in a first direction (horizontal direction). Here, the first electrode is a transparent electrode and may be made of an indium tin oxide (ITO) material. When each of the plurality of first electrodes 111, 112, 113, 114, 115, and 116 in the first electrode group 111, 112, 113, 114, 115, 116 detects the position of the finger, the first It may be a transmission electrode for transmitting a driving signal.

The second electrode group 121, 122, 123, 124, 125, 126 may include second electrodes 121, 122, 123, 124, 125, 126 disposed in a second direction (vertical direction). Here, the second electrode is a transparent electrode and may be made of an indium tin oxide (ITO) material. Each of the second electrodes 121, 122, 123, 124, 125, 126 in the second electrode group 121, 122, 123, 124, 125, 126 detects the position of the finger, It may be a reception electrode for receiving a first reception signal caused by the input first driving signal.

Meanwhile, in the illustrated example, it is shown that only six electrodes are included in each of the electrode groups, but when implemented, it may be implemented with 7 or more or 5 or less electrodes. In the illustrated example, the shape of the electrode in the electrode group is shown in a simple rectangular shape, but in implementation, the shape of each electrode may be implemented in a more complex shape.

The driving unit 130 applies a first driving signal and/or a second driving signal to the channel electrode unit 110 at a predetermined time. Since the detailed operation of the driving unit 130 has been described above in FIG. 2, a redundant description will be omitted.

The receiving unit 140 receives a first reception signal and a second reception signal together from different electrodes. Specifically, the receiving unit 140 receives a first received signal from each of the second electrodes in a plurality of channel units (three in the illustrated example) in parallel, and receives a plurality of second received signals from each of the first electrode and the second electrode. Parallel reception is possible in units of channels. A detailed operation of the receiving unit 140 will be described later with reference to FIG. 4.

In addition, the receiving unit 140 may perform various signal processing on the received first and second received signals. For example, the receiving unit 140 may amplify each received signal using an amplifier. Such an example will be described later with reference to FIG. 9.

The connection unit 160 may selectively connect each of the electrodes in the channel electrode unit 110 to the driving unit 130 or the receiving unit 140. The operation of the connection unit 160 may be performed by the control of the processor 150 to be described later, and may also be operated by the control of each driving unit 130 and the receiving unit 140. The connection unit 160 may be implemented using a plurality of switch elements.

The processor 150 measures the first received signal corresponding to the detection of the hand and the second received signal corresponding to the coordinate display device 200 together so that the detection of the hand and the position of the coordinate display device 200 can be measured together. It is possible to control the driving unit 130 and the receiving unit 140 to be able to be. The processor 150 may be implemented as a CPU, a microprocessor, or an ASIC.

For example, the processor 150 provides a first driving signal to the first subgroups 111, 112, 113 of the first electrode in the first time period (specifically, the digital code of the driving signal applied to each first electrode is The driving unit 130 is controlled so that the first driving signal is applied, and while the first driving signal is applied, the second subgroup 114 of the first electrode receives the first reception signal at some portions 121, 122, 123 of the second electrode. The receiver 140 may be controlled so that the second received signal is received at 115 and 116.

Thereafter, the processor 150 controls the driving unit 130 so that the first driving signal is continuously applied to the first subgroups 111, 112, and 113 in the second time period, and the second driving signal is applied during the application of the first driving signal. The receiving unit 140 may be controlled so that a second received signal is received from a part of the second electrode (121, 122, 123) together with the reception of the first received signal from another part of the electrode (124, 125, 126).

Thereafter, the processor 150 controls the driving unit 130 so that the first driving signal is applied to the second subgroups 114, 115, and 116 of the first electrode in the third time period, and during application of the first driving signal. The receiving unit 140 may be controlled to receive the first received signal from some of the second electrodes 121, 122, 123 and receive the second received signal from the other parts 124, 125, and 126 of the second electrode.

Thereafter, the processor 150 controls the driving unit 130 so that the first driving signal is continuously applied to the second subgroups 114, 115, and 116 in the fourth time period, and the second driving signal is applied during the application of the first driving signal. Control the receiving unit 140 so that the second receiving signal is received in the first subgroup 111, 112, 113 of the first electrode together with the first receiving signal in the other part of the electrode (124, 125, 126). I can.

Through such an operation, a first reception signal required for hand position detection and a second reception signal received from all electrodes required for position detection of the coordinate display device may be received.

And when the first received signals for all of the second electrodes are received, the processor 150 calculates the capacitance at a plurality of electrode intersections formed between the first electrode and the second electrode, and the processor 150 calculates the calculated capacitance. Based on the hand position can be determined.

For example, the processor 150 calculates the capacitance based on a change in the first received signal received from each of the second electrodes in the first to fourth time intervals, and the first electrode having the largest change in the calculated capacitance ( The Y coordinate corresponding to 114) can be determined as the Y coordinate of the hand, and the capacitance is calculated based on the change in the first received signal, and the X corresponding to the second electrode 125 having the largest change in the calculated capacitance The coordinates can be determined as the X coordinate of the hand.

And when the second reception signals for all the electrodes are received, the processor 150 determines the ratio between the second reception signals received from the first electrodes 111, 112, 113, 114, 115, and 116 and the second electrode 121, The position of the coordinate display device may be determined based on a ratio between the second received signals received at 122, 123, 124, 125, and 126.

For example, the size of the second received signal of the first electrode 113 is larger than the size of the second received signal of the other first electrodes 111, 112, 114, 115, 116, and If the magnitude of the response signal is larger than the magnitude of the second received signal of the other second electrodes 121, 122, 124, 125, 126, the processor 150 2 The second direction contact position of the coordinate display device 200 is determined from the ratio between the received signals, and the second of the coordinate display device 200 is determined from the ratio between the second received signals received from the second electrodes 122, 123, and 124. One-way contact position can be determined.

On the other hand, in the illustration and description of FIG. 3, it has been described that a plurality of electrodes are disposed in a matrix form, but may be disposed in a form other than a matrix form at the time of implementation.

4 is a diagram showing a detailed configuration of the receiver of FIG. 2.

Referring to FIG. 4, the receiving unit 140 includes a first receiving unit 141 and a second receiving unit 145.

The first receiver 141 receives a first reception signal for hand detection. Specifically, the first reception unit 141 may receive a first reception signal from each of the plurality of second electrodes in parallel in units of a plurality of channels. For example, the first receiving unit 141 may alternately receive a first reception signal from a portion 121, 122, 123 of the second electrode and another portion 124, 125, 126 of the second electrode. . Alternatively, the first receiver 141 may alternately receive a first reception signal from a portion 121, 123, 125 of the second electrode and another portion 122, 124, 126 of the second electrode. A detailed configuration of the first receiver 141 will be described later with reference to FIG. 9.

The second reception unit 145 receives a second reception signal for detection by the coordinate display device 100. Specifically, the second reception unit 145 may receive a second reception signal from each of the plurality of first and second electrodes. In this case, the second receiving unit 145 is not applied with the first driving signal, and the first receiving unit 141 may receive a second receiving signal for an electrode that does not receive the first receiving signal. A detailed configuration of the second receiver 145 will be described later with reference to FIG. 10.

5 to 8 are views for explaining the operation of the coordinate measuring apparatus according to the first embodiment. Specifically, the first embodiment is an operation when a stylus pen operating in an active manner and a position of a hand are measured together.

Referring to FIG. 5, the first electrode groups 111, 112, 113, 114, 115, and 116 are divided into a plurality of subgroups in units of a plurality of electrodes that are continuously arranged. In the illustrated example, the first electrode groups 111, 112, 113, 114, 115, and 116 may be divided into a first subgroup 111, 112, 113 and a second subgroup 114, 115, 116. .

In this state, the driving unit 130 provides a first driving signal (Tx Signal) to the first subgroups 111, 112, 113 of the first electrode group (specifically, the digital code of the driving signal applied to each first electrode). Has different values).

In addition, the first receiving unit 141 may receive the first receiving signal from some of the second electrode groups 121, 122, and 123 in a state in which the first driving signal is applied.

At the same time, the second receiver 145 may receive a second reception signal from the second subgroups 114, 115, 116 of the first electrode and some of the second electrodes 124, 125, 126.

Referring to FIG. 6, the driver 130 may continuously apply a first driving signal to the first subgroups 111, 112, and 113.

In addition, the first receiving unit 141 may receive the first receiving signal from the other portions 124, 125, and 126 of the second electrode while the first driving signal is applied.

In addition, the second receiving unit 145 may receive a second received signal from some of the second electrodes 121, 122, and 123.

Referring to FIG. 7, the driver 130 may apply a first driving signal to the second subgroups 114, 115, and 116 of the first electrode.

In addition, the first receiving unit 141 may receive the first receiving signal from some of the second electrodes 121, 122, and 123 while the first driving signal is applied.

In addition, the second receiver 145 may receive the second reception signal from the other portions 124, 125, 126 of the second electrode and the first subgroups 111, 112, and 113 of the first electrode.

Referring to FIG. 8, the driver 130 may continuously apply the first driving signal to the second subgroups 114, 115, and 116 of the first electrode.

In addition, the first receiving unit 141 may receive the first receiving signal from the other portions 124, 125, and 126 of the second electrode while the first driving signal is applied.

In addition, the second receiving unit 145 may receive a second received signal from some of the second electrodes 121, 122, and 123.

Through the same operation as in FIGS. 5 to 8 described above, the first receiving unit 141 may receive a first receiving signal for each of the second electrodes, and the second receiving unit 145 may be configured with a first electrode and a second electrode, respectively. A second received signal for may be received.

Meanwhile, although it has been described above that the subgroups are divided in advance, the subgroups may be dynamically changed during implementation. For example, the processor 150 includes an electrode (for example, 113) and an electrode (for example, 112, 114) within a preset interval with the corresponding electrode 113 and the electrode (for example, 113) that received the largest response signal in the previous sensing process. It can be determined as a subgroup to which the driving signals are to be input together. The determination of the subgroup may be performed in units of one time cycle required to determine the location of the coordinate display device.

In addition, although it has been described and illustrated above that the electrodes in each subgroup are disposed in succession, each subgroup may be disposed intersecting each other in implementation. For example, it may be divided into a first subgroup 111, 113, 115 and a second subgroup 112, 114, 116.

9 is a diagram showing a detailed configuration of the first receiver of FIG. 4.

Referring to FIG. 9, the first receiving unit 141 may include a demodulation unit 146, an integrator 147, and an ADC unit 148.

The demodulator 146 may demodulate and output the first received signal transmitted from each electrode. In this case, the driver 130 may generate a first driving signal modulated with a specific frequency or pattern in order to improve the signal-to-noise ratio. In addition, the demodulation unit 146 may receive information for demodulation of the first received signal from the processor 150 or the driving unit 130.

The integrator 147 may accumulate a signal output from the demodulator 146. Through this accumulation process, a high-frequency noise component included in the first received signal may be removed.

The ADC unit 148 may convert the signal output from the integrator 147 into a digital signal and transmit it to the processor 150, and the processor 150 may determine the position where the finger was touched based on the transmitted information. .

Meanwhile, in FIG. 9, the first receiving unit 141 is illustrated as including only one of the demodulation unit 146, the integrator 147, and the ADC unit 148. The receiving unit 141 may include a plurality of demodulators, integrators, and ADCs as many as the number of electrodes to be processed simultaneously.

10 is a diagram showing a specific configuration of the second receiver of FIG. 4.

Referring to FIG. 10, the second receiving unit 145 may include an amplifying unit 142, an ADC unit 143, and a signal processing unit (or DSP) 144.

The amplification unit 142 amplifies and outputs the second received signal transmitted from each electrode.

The ADC unit 143 converts the amplified second received signal into a digital signal.

The signal processor 144 may extract a magnitude and a frequency component of the received signal from the second received signal converted into a digital signal through a method such as Fourier Transform. The processor 150 may determine the contact position of the coordinate display device 200 by using the magnitude and frequency component of the extracted signal, and the second received signal may be transmitted according to the contact pressure of the coordinate display device 200. When the frequency changes, the contact pressure of the coordinate display device 200 may also be determined.

Meanwhile, as described above, the signal received from the electrode receives not only a desired signal, but also noise. In order to effectively control such noise, in the present embodiment, only the frequency component corresponding to the frequency domain of the second received signal may be extracted using the signal processing unit 144.

As described above, since the second receiver 145 can remove the noise component by extracting only the preset frequency component, the reception sensitivity of the response signal can be improved.

Meanwhile, in FIG. 10, the second receiving unit 145 is shown to include only one each of the amplifying unit 142, the ADC unit 143, and the signal processing unit (or DSP) 144, but in implementation, the second receiving unit 145 The second receiver 145 may include a plurality of amplification units, a plurality of ADCs, and a plurality of signal processing units as many as the number of electrodes to be simultaneously processed by the second receiver 145.

Meanwhile, when the input noise is large, a separate analog filter may be added to the front/rear or inside of the amplifying unit 142 described above to reduce the size of the noise.

11 to 12 are views for explaining the operation of the coordinate measuring apparatus according to the second embodiment. Here, the second embodiment is an operation when the active type stylus pen and the position of the hand are measured together in the global scanning process. Specifically, the coordinate measuring apparatus 100 may be divided into two steps: a global scan process for determining whether the pen is in contact, and a local scan for scanning a location near the existing pen. In the local scan step, some of the processes of the first and second embodiments described above may be omitted and applied.

Referring to FIG. 11, the driver 130 includes a first driving signal (Tx Signal) (specifically, a digital code of a driving signal applied to each first electrode) to the first subgroups 111, 112, and 113 of the first electrode. Has different values).

In addition, the first reception unit 141 may receive the first reception signal from all of the second electrodes 121, 122, 123, 124, 125, and 126 in a state in which the first driving signal is applied.

At the same time, the second receiver 145 may receive a second received signal from the second subgroups 114, 115, and 116 of the first electrode.

Referring to FIG. 12, the driver 130 may apply a first driving signal to the second subgroups 114, 115, and 116.

In addition, the first reception unit 141 may receive the first reception signal from all of the second electrodes 121, 122, 123, 124, 125, and 126 in a state in which the first driving signal is applied.

At the same time, the second receiver 145 may receive a second received signal from the first subgroups 111, 112, and 113 of the first electrode.

Through such an operation, the processor 150 may determine the position of the hand and determine whether there is contact with the coordinate display device.

13 to 16 are views for explaining the operation of the coordinate measuring apparatus according to the third embodiment. Here, the third embodiment is an embodiment in which the second receiver 145 receives the second reception signal of the first electrode and the second electrode together.

Referring to FIG. 13, the driver 130 includes a first driving signal (Tx Signal) (specifically, a digital code of a driving signal applied to each first electrode) to the first subgroups 111, 112, and 113 of the first electrode. Has different values).

In addition, the first receiving unit 141 may receive the first receiving signal from some of the second electrodes 121, 122, and 123 in a state in which the first driving signal is applied.

At the same time, the second receiver 145 may receive a second reception signal from the second subgroups 114, 115, and 116 of the first electrode and other portions 124, 125, and 126 of the second electrode.

Referring to FIG. 14, the driver 130 may continuously apply a first driving signal to the first subgroups 111, 112, and 113.

In addition, the first receiving unit 141 may receive the first receiving signal from the other portions 124, 125, and 126 of the second electrode while the first driving signal is applied.

In addition, the second receiving unit 145 may receive a second received signal from some of the second electrodes 121, 122, and 123.

Referring to FIG. 15, the driver 130 may apply a first driving signal to the second subgroups 114, 115, and 116 of the first electrode.

In addition, the first receiving unit 141 may receive the first receiving signal from some of the second electrodes 121, 122, and 123 while the first driving signal is applied.

In addition, the second receiver 145 may receive the second reception signal from the other portions 124, 125, 126 of the second electrode and the first subgroups 111, 112, and 113.

Referring to FIG. 16, the driver 130 may continuously apply the first driving signal to the second subgroups 114, 115, and 116 of the first electrode.

In addition, the first receiving unit 141 may receive the first receiving signal from the other portions 124, 125, and 126 of the second electrode while the first driving signal is applied.

In addition, the second reception unit 145 may receive a second reception signal from the other portions 121, 122, and 123 of the second electrode.

13 through 16 described above, the first receiving unit 141 may receive the first receiving signals of all of the second electrodes for each of the first electrodes, and the second receiving unit 145 may be a first electrode And a second reception signal for each of the second electrodes.

17 to 19 are views for explaining the operation of the coordinate measuring apparatus according to the fourth embodiment. Specifically, the fourth embodiment is an operation when a stylus pen operating in a passive manner and a position of a hand are measured together. In addition, in the fourth embodiment, it is assumed that the coordinate measuring apparatus 100 knows the position of the hand and the position of the stylus through previous detection.

Referring to FIG. 17, in order to receive a response signal from a stylus pen operating in a passive manner, it is necessary to transmit a driving signal to an electrode in advance. Accordingly, the driving unit 130 generates a second driving signal and applies it to the plurality of electrodes 111, 112, 113, 124, 125 and 126. In the present embodiment, it is shown that the second driving signal is applied to only six electrodes. However, in the implementation, the second driving signal may be applied to all electrodes, and the second driving signal may be applied only to all the first electrodes, or to all the second electrodes. The second driving signal may be applied only to the electrode.

In the process of applying the second driving signal, the first receiving unit 141 and the second receiving unit 145 do not receive the signal.

Meanwhile, it is advantageous that the second driving signal for excitation of the passive coordinate display device and the first driving signal for capacitance sensing have different driving frequencies to minimize signal interference.

In addition, in the case of a resonant passive pen, a signal generated by the pen by receiving energy from the touch panel has a characteristic of being a sine wave as a resonant signal. Accordingly, in the coordinate measuring apparatus, only a signal having a frequency near the resonance frequency among the transmitted second driving signals excites the resonance circuit of the pen.

Therefore, it is effective that the second driving signal (ie, the pen excitation signal) is a signal from which higher order harmonics of the resonance frequency have been removed.

On the other hand, in electronic devices, generation of unnecessary noise is regulated by an Electro-Magnetic Interference (EMI) standard according to frequency. In the case of removing the high-order harmonic wave, it is advantageous in terms of EMI as it reduces high-frequency noise.

The frequency of the second drive signal to excite the passive stylus pen is usually used a frequency of several M Hz or less, but if there are many higher order terms in the drive signal, the EMI standard defines 30 MHz. There is a possibility that more noise than necessary may be generated even at a higher frequency, and the occurrence of such a problem can be prevented by applying a low pass filter.

Referring to FIG. 18, the driving unit 130 provides a first driving signal (Tx Signal) (specifically, only a portion 113, 114, 115) of the first electrode corresponding to the position of the hand according to the previously sensed position of the hand. Digital codes of driving signals applied to each of the first electrodes may have different values).

In addition, the first receiving unit 141 may receive the first receiving signal from some of the second electrodes 121, 122, and 123 in a state in which the first driving signal is applied.

At the same time, the second receiving unit 145 may receive a second receiving signal from the other portions 124, 125, and 126 of the second electrode.

Referring to FIG. 19, the second reception unit 145 may receive a second reception signal from some of the first electrodes 111, 112, and 113.

As described above, in the case of the fourth embodiment, the position of the hand and the position of the coordinate display device can be quickly measured with only two separate operations except for the application of the second driving signal.

20 is a diagram showing a specific configuration of a passive coordinate display device.

Referring to FIG. 20, the coordinate display device 200 may include a conductive tip 210, a resonance circuit part 220, and a ground part 230. The coordinate display device 200 may be implemented in the shape of a pen, for example.

The conductive tip 210 (or the transmission electrode) forms a capacitance with at least one of the plurality of electrodes in the coordinate measuring device 100. The conductive tip 210 may be formed of a metallic tip, for example. In addition, the conductive tip 210 may exist inside a non-conductive material or a part of the conductive tip 210 may be exposed to the outside. In addition, the conductive tip 210 may further include an insulating portion preventing direct contact with the outside in order to soften the feeling of writing during use.

The resonance circuit unit 220 includes a parallel connection circuit composed of an inductor and a capacitor connected to a conductive tip.

In addition, the resonance circuit unit 220 may receive energy for resonance through a capacitive coupling between at least one electrode in the coordinate measuring device 100 and a conductive tip. Specifically, the resonance circuit unit 220 may resonate with a driving signal input from the coordinate measuring apparatus 100. In addition, the resonance circuit unit 220 may further output a resonance signal due to resonance for a preset time even after the input of the driving signal is stopped. For example, the resonant circuit unit 220 may output a sinusoidal signal having a resonant frequency of the resonant circuit unit 220.

In addition, the resonant circuit unit 220 may change a resonant frequency by varying the capacitance of the capacitor or the inductance of the inductor according to the contact pressure of the conductive tip.

In addition, the resonance circuit unit 220 may change the resonance frequency by varying the capacitance of the capacitor or the inductance of the inductor according to the user's manipulation.

FIG. 21 is a diagram illustrating a circuit diagram when the coordinate display device of FIG. 20 contacts the coordinate measuring device.

Referring to FIG. 21, the passive coordinate display device 200 includes a capacitance coupling 830 between the conductive tip 210 and the channel electrode 821 according to a voltage change of the channel electrode 821 of the coordinate measuring device 100. ) To receive energy for resonance.

The resonant circuit unit 220 in the coordinate display device 200 can be simply composed of an inductor and a capacitor. When the capacitance of the capacitor of the resonant circuit unit 220 is changed according to the pressure of the pen tip 210 pressing the coordinate measuring device 100, the resonant frequency of the pen may be changed according to the pressure of the pen. The change in the resonance frequency may measure the frequency of the second reception signal received by the second receiver 145 of the coordinate measuring device to measure the contact pen pressure of the coordinate display device.

Meanwhile, one end of the resonance circuit unit 220 is connected to the ground unit 230, and the ground unit 230 is usually connected to the user's hand through an outer case of the coordinate display device.

22 is a diagram showing a detailed configuration of an active coordinate display device according to the first embodiment.

Referring to FIG. 22, the coordinate display device 200 ′ may include a conductive tip 210, a circuit unit 240, and a power supply unit 250. The coordinate display device 200 ′ may be implemented in the shape of a pen, for example.

The conductive tip 210 forms a capacitance with at least one of a plurality of electrodes in the coordinate measuring device 100. The conductive tip 210 may be formed of a metallic tip, for example. In addition, the conductive tip 210 may exist inside a non-conductive material or a part of the conductive tip 210 may be exposed to the outside. In addition, the conductive tip 210 may further include an insulating portion preventing direct contact with the outside in order to soften the feeling of writing during use.

In addition, the conductive tip 210 may receive a trigger signal (or an excitation signal) from the coordinate measuring device 100. Here, the trigger signal is a signal having a preset frequency and may have the same frequency as the first driving signal.

The circuit unit 240 generates a response signal having a preset frequency and provides it to the conductive tip 210. Specifically, the circuit unit 240 may generate a response signal of a specific frequency generated by an internal element according to the power provided from the power supply unit 250. In addition, the circuit unit 240 may provide the generated response signal to the conductive tip 210. Here, the response signal becomes an electric signal for measuring the contact position of the coordinate display device 200 to the coordinate measuring device 100.

In addition, the circuit unit 240 may sense the pen pressure at the conductive tip 210 and change the frequency of the response signal according to the sensed pen pressure. In addition, the circuit unit 240 may detect an operation mode of the coordinate display device, generate a response signal having a frequency corresponding to the detected operation mode, and provide it to the conductive tip 210.

In addition, when a trigger signal is detected from the conductive tip 210, the circuit unit 240 may generate a response signal for a preset time. If the trigger signal is not detected again within a preset time, the circuit unit 240 may stop generating the response signal. In addition, the circuit unit 240 may control each component in the coordinate display device 200 ′ so that the coordinate display device 200 ′ maintains a power saving state.

The power supply unit 250 may provide power to a circuit unit.

23 is a diagram showing a detailed configuration of an active coordinate display device according to a second embodiment.

Referring to FIG. 23, the coordinate display device 200 ″ may include a transmission electrode 210, a reception electrode 260, a circuit unit 240 ′, and a power supply unit 250. Such a coordinate display device 200 ″ May be implemented in the shape of a pen, for example.

The transmission electrode 210 (or the conductive tip) forms a capacitance with at least one of the plurality of electrodes in the coordinate measuring device 100. The transmission electrode 210 may be formed of, for example, a metallic tip. In addition, the transmission electrode 210 may exist inside a non-conductive material or a part of the transmission electrode 210 may be exposed to the outside. In addition, in order to soften the writing feeling during use, the transmission electrode 210 may further include an insulating portion preventing direct contact with the outside.

In addition, the receiving electrode 260 forms a capacitance with at least one of a plurality of electrodes in the coordinate measuring device 100. In addition, the receiving electrode 260 may receive a trigger signal from the coordinate measuring device 100.

The circuit unit 240 generates a response signal having a preset frequency and provides it to the conductive tip 210. Specifically, the circuit unit 240 may generate a response signal of a specific frequency generated by an internal element according to the power provided from the power supply unit 250. In addition, the circuit unit 240 may provide the generated response signal to the conductive tip 210.

In addition, the circuit unit 240 may sense the pen pressure at the conductive tip 210 and change the frequency of the response signal according to the sensed pen pressure. In addition, the circuit unit 240 may detect an operation mode of the coordinate display device, generate a response signal having a frequency corresponding to the detected operation mode, and provide it to the conductive tip 210.

In addition, when a trigger signal is detected from the receiving electrode 260, the circuit unit 240 may generate a response signal for a preset time. If the trigger signal is not detected again within a preset time, the circuit unit 240 may stop generating the response signal or reduce the magnitude of the response signal. In addition, the circuit unit 240 may control each component in the coordinate display device 200" so that the coordinate display device 200" maintains a power saving state.

The power supply unit 250 may provide power to a circuit unit.

24 to 25 are views for explaining the operation of the coordinate measuring apparatus according to the fifth embodiment. Specifically, the fifth embodiment is an embodiment in which the first driving signal is used as a trigger signal for waking up the active coordinate display device.

Referring to FIG. 24, the driver 130 (not shown) includes a first driving signal (Tx Signal) (specifically, a driving signal applied to each first electrode) to the first subgroups 111, 112, and 113 of the first electrode. The digital code of has different values).

In addition, the first reception unit 141 may receive the first reception signal from all of the second electrodes 121, 122, 123, 124, 125 and 126 in a state in which the first driving signal is applied.

In this case, since the first driving signal is used as a trigger signal, the coordinate display device 200 generates a response signal by detecting the first driving signal.

Accordingly, referring to FIG. 25, the second reception signal corresponding to the response signal generated by the coordinate display apparatus 200 is received by the second reception unit 145.

26 to 27 are views for explaining the operation of the coordinate measuring apparatus according to the sixth embodiment. Specifically, the sixth embodiment is an embodiment in which a trigger signal for waking up an active coordinate display device is used.

Referring to FIG. 26, the driver 130 (not shown) includes a first driving signal (Tx Signal) (specifically, a driving signal applied to each of the first electrodes) to the second subgroups 114, 115, and 116 of the first electrode. The digital code of has different values).

In addition, the driver 130 may apply a trigger signal for excitation of the active coordinate display device to the first subgroups 111, 112, and 113 of the first electrode.

In addition, the first reception unit 141 may receive the first reception signal from all of the second electrodes 121, 122, 123, 124, 125 and 126 in a state in which the first driving signal is applied.

Upon detecting the trigger signal, the coordinate display device 200 generates a response signal.

Accordingly, referring to FIG. 27, the second reception signal corresponding to the response signal generated by the coordinate display apparatus 200 is received by the second reception unit 145.

Meanwhile, in FIG. 26, a response to a trigger signal for excitation of the coordinate display device 200 is also introduced into the first receiver 141. In this case, if the driving frequencies of the trigger signal and the first driving signal are different from each other, the influence of the trigger signal on the first received signal can be reduced.

In another embodiment, the first driving signal for sensing capacitance may be encoded into a digital code such as a Hmadamard code. If such encoding is used, the influence of the trigger signal may be removed by the first receiver 141.

28 to 31 are waveform diagrams according to various driving methods of the coordinate display device and the coordinate measurement device according to the present embodiment.

Referring to FIG. 28, the driver 130 applies an active trigger signal for excitation to the channel electrode (A. Capacitive Sensing driving signal).

When the trigger signal is received, the coordinate display device 200' generates a response signal for a predetermined period (T1) (C. Pen signal).

In response to the generation of such a response signal, the second reception unit 145 may receive a second reception signal corresponding to the response signal generated by the coordinate display device 200 ′ (D. A reception signal from the Pen signal reception unit).

Meanwhile, when the coordinate display device 200 is present, the coordinate measuring device 100 knows that the response signal will be received for a certain period (T1) after the trigger signal is applied. A corresponding second received signal may be received.

Referring to FIG. 29, the driver 130 applies a first driving signal for sensing capacitance to the channel electrode (A. Capacitive Sensing driving signal).

The first reception unit 141 receives a first reception signal for sensing capacitance from an electrode crossing the channel electrode to which the first driving signal is applied (B. Capacitive Sensing reception signal).

When the provision of the first driving signal for sensing capacitance is completed, the coordinate display device 200 ′ may generate a response signal for a predetermined period (T1) (C. pen signal). That is, the driver 130 may use the first driving signal as a trigger signal instead of a separate trigger signal.

In the case of such an embodiment, since the coordinate measuring apparatus 100 does not need a separate driving signal for excitation of the coordinate display device, the circuit configuration can be simplified.

Meanwhile, the coordinate display device 200 ′ generates a response signal according to an excitation signal (ex trigger signal or a first driving signal) of the coordinate measuring device 100, and the time at which the response signal is generated and the first driving signal are applied. If the sections overlap, the sensitivity of capacitance sensing may be deteriorated.

In order to solve this problem, referring to FIGS. 30 and 31, when the frequency of the response signal generated by the coordinate display device is different from the frequency of the first driving signal used for capacitance sensing, the generation period of the response signal and the first Even when the section in which the driving signal is applied overlaps, a decrease in sensitivity of capacitance sensing can be reduced.

As another embodiment, there may be a method of using the Hadamard code as described above.

32 to 34 are diagrams for explaining the operation of the coordinate measuring apparatus according to the sixth embodiment.

Referring to FIGS. 32 and 33, the driver 130 applies a first driving signal for sensing capacitance to the channel electrode for a predetermined period T1 (A. Capacitive Sensing driving signal).

When the first driving signal is applied, the first receiving unit 141 receives the first reception signal from the second electrodes 121, 122, and 123 crossing the first electrode to which the first driving signal is applied (B. Capacitive Sensing received signal).

Meanwhile, the coordinate display device 200 ′ is excited by the first driving signal to generate a response signal for a predetermined time (C. pen signal).

Meanwhile, the second reception unit 145 may receive the second reception signal corresponding to the response signal during a preset time period (T3 period).

Referring to FIGS. 32 and 34, the second receiving unit 145 may receive a second received signal corresponding to the response signal from the first electrodes 111, 112, and 113 for a preset time period (T4 period).

35 is a flowchart illustrating a method of measuring coordinates of a coordinate measuring apparatus according to an embodiment of the present disclosure.

Referring to FIG. 35, a first driving signal is applied in units of a plurality of electrodes to a first electrode disposed in a first direction among a plurality of electrodes in the channel electrode unit (S3510). Here, the first driving signal is a signal of a frequency band different from the response signal received from the coordinate display device 200 to be described later, and has a digital code. That is, driving signals having different digital codes may be applied to the plurality of first electrodes.

Meanwhile, when the coordinate display device 200 is a stylus pen operating in a passive manner, a second driving signal may be applied to a plurality of electrodes in the channel electrode. In this case, the second driving signal has a frequency band different from that of the first driving signal, and may be applied to the plurality of electrodes together. In addition, the second driving signal may be applied prior to application of the first driving signal, or may be applied simultaneously with the application of the first driving signal. For example, a first driving signal may be applied to a first subgroup of the first electrode and a second driving signal may be applied to a second subgroup.

In addition, a second reception signal corresponding to a response signal transmitted from the coordinate display device may be received from another part of the plurality of electrodes together with reception of a first reception signal for detecting a change in capacitance from some of the plurality of electrodes ( S3520). Specifically, a first reception signal may be received from each of the plurality of second electrodes in units of a plurality of channels. In addition, it is possible to amplify the received first received signal and perform various signal processing.

In addition, a second received signal may be received in units of a plurality of channels from an electrode that is not used for receiving a first received signal or applying a first driving signal among the plurality of first electrodes and the plurality of second electrodes. In addition, filtering and various signal processing may be performed on the received second received signal.

Further, the position of at least one of the hand and the coordinate display device is determined based on the received first and second received signals (S3530). Specifically, a capacitance between each electrode may be calculated at a plurality of electrode intersections formed between the first electrode and the second electrode using the first received signal, and the position of the hand may be determined based on the calculated capacitance.

In addition, the position of the coordinate display device may be determined based on the ratio between the second reception signals received from the first electrode and the second reception signals received from the second electrode.

As described above, the coordinate measuring method of the coordinate measuring apparatus according to the present embodiment receives the first received signal for detecting the position of the hand and the second received signal for detecting the position of the stylus pen at a high speed. And the position of the stylus pen can be measured at the same time. In addition, since the coordinate measuring method of the coordinate measuring apparatus according to the present exemplary embodiment performs various signal processing on a received signal, reception sensitivity for a response signal may be improved. The coordinate measuring method as shown in FIG. 35 may be executed on the coordinate measuring device having the configuration of FIG. 2, and may be executed on the coordinate measuring device having other configurations.

In addition, the coordinate measuring apparatus as described above may be implemented as a program executable in the processor 150 of FIG. 2, and the program may be provided by being stored in a non-transitory computer readable medium. .

The non-transitory readable medium refers to a medium that stores data semi-permanently and can be read by a device, not a medium that stores data for a short moment, such as a register, cache, and memory.

36 is a flowchart illustrating a method of controlling a coordinate display device according to an embodiment of the present disclosure.

Referring to FIG. 36, the coordinate display device 200 has a power saving mode that does not generate a response signal and an operation mode that generates a response signal.

The coordinate display device 200 in the power saving mode detects a driving signal (S3610). Here, the driving signal may be a first driving signal for detecting the position of the hand in the coordinate measuring apparatus 100.

When the driving signal is detected, a response signal having a preset resonance frequency is generated, and the generated response signal is emitted through the conductive tip (S3620). That is, when the coordinate display device 200 detects a driving signal, the coordinate display device 200 may switch from the power saving mode to the operation mode. The frequency of the response signal generated here may be varied according to the contact pressure of the conductive tip and the mode state (eg, a writing mode, an eraser mode).

In addition, when a preset time elapses after receiving the driving signal, the coordinate display device 100 switches to the power saving mode. That is, the operation of generating and emitting the response signal described above can be stopped. In addition, it is also possible to apply a method of reducing power consumption by reducing the size of the response signal.

As described above, in the method of controlling the coordinate display device according to the present embodiment, the turn-on and turn-off of the response signal are automatically adjusted according to whether the driving signal is detected, so that power of the coordinate display device operating in the active method can be saved do. The control method as shown in FIG. 36 may be executed on the coordinate display device of FIG. 22 or 23, and may also be executed on the coordinate display device having other configurations.

In addition, the control method as described above may be implemented as a program executable in a coordinate display device, and the program may be provided by being stored in a non-transitory computer readable medium.

The non-transitory readable medium refers to a medium that stores data semi-permanently and can be read by a device, not a medium that stores data for a short moment, such as a register, cache, and memory.

In addition, although the preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above, and the technical field to which the disclosure belongs without departing from the gist of the disclosure claimed in the claims. In addition, various modifications may be possible by those of ordinary skill in the art, and these modifications should not be individually understood from the technical idea or perspective of the present disclosure.

100: coordinate measuring device 110: channel electrode unit
130: driving unit 140: receiving unit
150: processor 200: coordinate display device
210: conductive tip 220: resonant circuit
230: circuit part 240: ground part
250: power unit 300: coordinate measuring system

Claims (20)

In the coordinate measuring device,
A channel electrode unit including a plurality of electrodes;
A driving unit generating a driving signal and providing a driving signal to the channel electrode unit;
A receiver configured to receive a first received signal for detecting a change in capacitance from some of the plurality of electrodes and a second received signal corresponding to a signal transmitted from the coordinate display device from another part of the plurality of electrodes; And
A processor for determining a position of at least one of a hand and a coordinate display device based on the received first received signal and the second received signal; and
The receiving unit,
Parallel reception of the first received signal and the second received signal in units of a plurality of channels,
The processor,
Coordinate measuring device for controlling the receiving unit to receive the first and second received signals from different electrodes together. The method of claim 1,
The driving unit,
A coordinate measuring device for generating a driving signal having a frequency band different from that of the second received signal and providing it to the channel electrode unit. The method of claim 1,
The channel electrode part,
A first electrode group including a plurality of first electrodes disposed in a first direction; And
Including; a second electrode group including a plurality of second electrodes disposed in a second direction perpendicular to the first direction,
The receiver, while the driver drives the first electrode group to generate the first received signal, the coordinate measuring device to receive the second received signal from the second electrode group. The method of claim 1,
The channel electrode part,
A first electrode group including a plurality of first electrodes disposed in a first direction; And
Including; a second electrode group including a plurality of second electrodes disposed in a second direction perpendicular to the first direction,
The receiving unit receives the second received signal from the remaining part of the first electrode group while the driving unit drives a part of the first electrode group to generate a first receiving signal. The method of claim 4,
The first received signal and the second received signal is a coordinate measuring device that is a signal of different frequency bands. delete The method of claim 1,
The processor,
Calculate a capacitance between each electrode at a plurality of electrode intersections using the first received signal, determine the position of the hand based on the calculated capacitance,
A coordinate measuring device that determines the position of the coordinate display device based on a ratio between the received second received signals. The method of claim 1,
The driving unit,
A first driving signal for generating a first received signal and a second driving signal for generating a signal of a coordinate display device approaching the coordinate measuring device are generated through a combination of capacitance,
The first driving signal and the second driving signal are signals of different frequency bands. The method of claim 8,
The driving unit,
A coordinate measuring device that provides each of the first driving signal and the second driving signal to different electrodes together. The method of claim 8,
The second driving signal is a signal obtained by filtering higher-order harmonics of a signal frequency. The method of claim 1,
The receiving unit,
A first receiver configured to receive a first received signal for detecting a change in capacitance; And
And a second receiver configured to receive a second received signal corresponding to a signal transmitted from the coordinate display device during reception of the first received signal. The method of claim 11,
The second receiver,
An amplification unit amplifying and outputting the received second received signal;
An ADC unit converting the amplified second received signal into a digital signal; And
And a signal processing unit that extracts a preset frequency component from the second received signal converted into the digital signal. The method of claim 11,
The second receiver,
A filter unit filtering a preset band from the received second received signal;
A measuring unit measuring the size of the filtered second received signal; And
Coordinate measuring apparatus comprising a; extracting unit for extracting the pen pressure information by using the frequency band of the filtered second received signal. In the coordinate measuring device for sensing the contact position of the hand by electrostatic method and detecting the contact position of a coordinate display device generating an electrical signal for measuring the contact position
A channel electrode unit including a plurality of electrodes;
A driving unit generating a driving signal and providing a driving signal to the channel electrode unit;
A receiving unit configured to receive a second receiving signal corresponding to the electric signal generated from the coordinate display device together with a first receiving signal for detecting a change in capacitance from electrodes in the channel electrode unit; And
And a processor that determines a position of at least one of a hand or a coordinate display device based on the first received signal and the second received signal received from the receiving unit,
The driving unit,
Generates a first driving signal for detecting a change in the capacitance and a second driving signal that is an excitation signal for generating the electric signal of the coordinate display device, and the first driving signal and the second driving A coordinate measuring device that applies each signal to different electrodes together. The method of claim 14,
The first driving signal and the second driving signal are signals of different frequency bands. The method of claim 14,
The driving unit,
A coordinate measuring device that provides first driving signals of different digital codes for each electrode. In the coordinate measuring system,
A coordinate measuring device including a plurality of electrodes; And
Including; a coordinate display device for transmitting a response signal to at least one electrode of the coordinate measuring device,
The coordinate measuring device generates a driving signal to detect a change in capacitance between two electrodes intersecting among the plurality of electrodes,
The coordinate display device generates a response signal for a preset time when the driving signal is detected,
The coordinate measuring device,
A first received signal for detecting a change in capacitance and a second received signal for detecting the response signal are received in parallel in a unit of a plurality of channels, and the first received signal and the second received signal received together A coordinate measurement system that determines the position of at least one of a hand and a coordinate display device based on the hand and coordinate display device.
The method of claim 17,
The response signal and the driving signal are signals of different frequency bands. The method of claim 17,
The coordinate display device,
A coordinate measuring system for generating a response signal for a preset time after detection of the driving signal is terminated. The method of claim 17,
The coordinate display device,
A first signal receiver configured to receive a first received signal for detecting a change in capacitance; And
Including; a second signal receiving unit for receiving a second received signal for detecting the response signal,
The first signal receiving unit and the second signal receiving unit,
A coordinate measuring system for receiving the first received signal and the second received signal together from a different electrode among the plurality of electrodes.

Images