KR20230087961A - Active Stylus pen for brush and input system using the same - Google Patents

Abstract

The present invention relates to a brush-type active stylus pen that operates in conjunction with a touch screen panel having a detection circuit for detecting a touch point. To this end, the brush-type active stylus pen comprises: a touch unit composed of a plurality of conductive fiber strands and operating as a receiving antenna for receiving a signal from the touch screen panel by touching or approaching the touch screen panel; a circuit unit for outputting, as the signal is received through the receiving antenna, a corresponding transmission signal; and a transmission antenna for transmitting a transmission signal output from the circuit unit to the touch screen panel. According to the present invention, it is possible to increase the accuracy of the brush-type touch.

Description

Brush-type active stylus pen and input system using the same {Active Stylus pen for brush and input system using the same}

The present invention relates to an active stylus pen.

Flat Panel Displays (FPDs) (hereinafter, simply referred to as 'display devices') are used in various types of electronic products including mobile phones, tablet PCs, and laptop computers. Flat panel display devices include a liquid crystal display (LCD), a plasma display (PDP), an organic light emitting display (OLED), and the like, and recently, an electrophoretic display ( EPD: ELECTROPHORETIC DISPLAY) is also widely used.

A touch screen panel is a type of input device that is installed on a display device and allows a user to input information by directly contacting the screen with a finger or a pen while viewing the display device.

As a method of sensing a touch, there is a method of sensing a touch using a change in capacitance. In the capacitive method, when a human body or a conductive material contacts the touch screen panel, a change in capacitance is sensed to determine whether or not there is a touch and touch coordinates.

The capacitive method may also be applied to a method of determining whether or not a touch is performed by a pen. For example, when a conductive material is included in the pen, the presence or absence of touch may be determined using a change in capacitance between the pen and the touch screen panel.

In addition, as described in US Patent Publication No. 2013-0106720, etc., when an active pen that outputs a pen voltage so that the touch sensing unit can sense the pen is used, a capacitive touch screen panel is used to And the presence or absence of touch can be determined by the active pen.

In addition, as described in Korean Patent Publication No. 10-2014-0022222, etc., when a touch driving voltage is received from the touch screen panel, when a stylus pen that outputs a pen signal wirelessly is used, the touch screen panel is provided The display device receives the pen signal and determines a location where the active stylus pen touches the touch screen panel.

In recent years, with the spread of mid-to-large-sized smart devices capable of precise sensing of touch screens such as tablet PCs, electronic touches to give a brush touch feel directly to touch screens along with input devices to implement calligraphic effects, an oriental writing culture Interest in the brush is growing.

Republic of Korea Patent Publication No. 10-2014-0072531 (2014.06.13. Publication)

The present invention is composed of a plurality of conductive fiber strands and a touch unit operating as a reception antenna capable of receiving signals from a touch screen panel according to touch or proximity, and a transmission signal corresponding to a signal received through the reception antenna. Provided is a brush-type active stylus pen capable of increasing brush-type touch accuracy and an input system using the same by providing a transmission antenna that can be provided to a touch screen panel.

In addition, the present invention provides a brush-type active stylus pen in which a transmitting antenna is implemented between conductive fiber strands and an input system using the same.

As a technical means for achieving the above technical problem, the brush-type active stylus pen according to an embodiment of the present invention is a brush-type active stylus pen that operates in conjunction with a touch screen panel having a detection circuit for detecting a touch point. a touch unit composed of a plurality of conductive fiber strands and operating as a reception antenna for receiving a signal from the touch screen panel as it is touched or approached on the touch screen panel; and the signal is received through the reception antenna. A circuit unit for outputting a transmission signal corresponding to the received signal and a transmission antenna for transmitting the transmission signal output from the circuit unit to the touch screen panel may be provided.

According to an embodiment of the present invention, the transmitting antenna may be disposed between the plurality of conductive fiber strands and connected to the circuit unit.

According to an embodiment of the present invention, the transmission antenna is formed in a form protruding from the plurality of conductive fiber strands, and portions other than the protruding portion are made of a predetermined insulating material to minimize interference with the conductive fiber strands. It may be a conductor covered with

According to an embodiment of the present invention, the transmission antenna includes a conductor connected to the circuit unit to receive and transmit a transmission signal output from the circuit unit, a first insulator surrounding the outside of the conductor, and the first It may be composed of a ground shielding part surrounding the outside of the insulator and a second insulator covering the outside of the ground shielding part.

According to an embodiment of the present invention, the conductor is formed in a form protruding from the plurality of conductive fiber strands, and the first insulator, the ground shielding portion, and the second insulator may cover only the remaining portion except for the protruding portion. there is.

According to an embodiment of the present invention, the circuit unit includes an amplifier that amplifies the signal received through the reception antenna, and a comparator that outputs the signal to the transmission antenna when the signal amplified by the amplifier is equal to or greater than a preset threshold. can include

As a technical means for achieving the above technical problem, the brush-type active stylus pen according to an embodiment of the present invention is a brush-type active stylus pen that operates in conjunction with a touch screen panel having a detection circuit for detecting a touch point. a touch unit composed of a plurality of conductive fiber strands and operating as a reception antenna for receiving a signal from the touch screen panel as it is touched or approached on the touch screen panel; and the signal is received through the reception antenna. An amplification unit for amplifying and outputting the signal as it is received, and a transmission antenna for receiving and outputting a transmission signal corresponding to the signal as the signal is received through the reception antenna, and amplifying from the amplification unit A comparator for applying the transmission signal to the transmission antenna when the signal is equal to or greater than a predetermined threshold, an A/D conversion module for converting the signal output by the amplification unit into a digital signal, and converting the digital signal into a short-range radio A communication module for transmitting to a device having a touch screen panel connected through communication may be included.

As a technical means for achieving the above technical problem, in the input system using a brush-type active stylus pen according to an embodiment of the present invention, the device detects the touch position of the brush-type active stylus pen by receiving the transmission signal. and an application that obtains pen pressure information using the received digital signal and then processes an input of the brush-type active stylus pen based on the acquired pen pressure information.

According to the above-described embodiment of the present invention, the touch unit composed of a plurality of conductive fiber strands and operating as a reception antenna capable of receiving a signal from a touch screen panel according to touch or proximity, and a signal received through the reception antenna By providing a transmission antenna capable of providing a transmission signal corresponding to the touch screen panel, brush-type touch accuracy can be increased.

1 is a schematic diagram illustrating a touch generated on a touch screen panel by a brush-type active stylus pen according to an embodiment of the present invention.
2 is a diagram for explaining the concept of a brush-type active stylus pen according to an embodiment of the present invention.
3 is an exemplary view to which a brush-type active stylus pen according to an embodiment of the present invention is applied.
4 is an exemplary diagram for explaining the structure of a transmission antenna of a brush-type active stylus pen according to an embodiment of the present invention.
5 is a diagram showing a detailed configuration of a circuit unit of a brush-type active stylus pen according to an embodiment of the present invention.
6 is a diagram for explaining an interlocking process between a brush-type active stylus pen and an electronic device according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The detailed descriptions that follow are provided to provide a comprehensive understanding of the methods, devices and/or systems described herein. However, this is only an example and the present invention is not limited thereto.

In describing the embodiments of the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or operator. Therefore, the definition should be made based on the contents throughout this specification. Terminology used in the detailed description is only for describing the embodiments of the present invention and should in no way be limiting. Unless expressly used otherwise, singular forms of expression include plural forms. In this description, expressions such as "comprising" or "comprising" are intended to indicate any characteristic, number, step, operation, element, portion or combination thereof, one or more other than those described. It should not be construed to exclude the existence or possibility of any other feature, number, step, operation, element, part or combination thereof.

Hereinafter, a brush-type active stylus pen and an operating method thereof according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a schematic diagram for explaining a touch generated on a touch screen panel by a brush-type active stylus pen according to an embodiment of the present invention, and FIG. 2 explains the concept of a brush-type active stylus pen according to an embodiment of the present invention. 3 is an exemplary view to which a brush-type active stylus pen according to an embodiment of the present invention is applied, and FIG. 4 is a diagram for explaining the structure of a transmission antenna of a brush-type active stylus pen according to an embodiment of the present invention. FIG. 5 is a diagram showing the detailed configuration of a circuit unit of a brush-type active stylus pen according to an embodiment of the present invention, and FIG. 6 is a view showing a brush-type active stylus pen and an electronic period according to an embodiment of the present invention. It is a diagram for explaining the interlocking process of

As shown in FIGS. 1 and 2, the brush-type active stylus pen 200 is composed of a receiving electrode and a transmitting electrode, and has a capacitive touch screen panel (not shown) having a detection circuit (not shown) for detecting a touch point. 100) can be operated in conjunction with the applied touch sensing system. Specifically, the brush-type active stylus pen 200 is composed of a plurality of conductive fiber strands 202 and is a reception antenna for receiving a signal from the touch screen panel 100 as it is touched or approached to the touch screen panel 100. As the signal is received through the touch unit 210 operating as , it can be transmitted to the touch screen panel 100 through the antenna 240 for transmission.

In the touch sensing system provided with the touch screen panel 100 using the capacitive method applied to the embodiment of the present invention, when a human body or a conductive material contacts the touch sensor of the touch screen panel 100, the capacitance of It detects the change and calculates whether there is a touch or touch coordinates. That is, the touch screen panel 100 shows an example in which a plurality of transmit (TX) electrodes are disposed on a lower layer and a plurality of receive (RX) electrodes are disposed on an upper layer, but a plurality of RX electrodes are disposed on a lower layer and a plurality of RX electrodes are disposed on an upper layer. A plurality of TX electrodes may be disposed on, and the TX electrodes and the RX electrodes may be disposed on the same layer.

The touch sensing system according to an embodiment of the present invention uses a sensing signal sensed as the brush-type active stylus pen 200 approaches or contacts the touch screen panel 100, and uses the brush-type active stylus pen 200 to Touch coordinates can be calculated. To this end, in the touch sensing system according to the embodiment of the present invention, the brush-type active stylus pen 200 may provide a pen driving signal (hereinafter referred to as a 'transmission signal') to the touch screen panel 100. . That is, the transmission signal may be provided to a readout circuit (not shown) via the sensing line of the touch screen panel 100 and used to calculate touch coordinates.

In particular, the brush-type active stylus pen 200 according to an embodiment of the present invention, as shown in FIGS. 3 to 5, is composed of a plurality of conductive fiber strands 202 and touches the touch screen panel 100. As a result, the touch unit 210 operating as a reception antenna for receiving signals from the transmission electrode is formed inside the body 220 connected to the touch unit 210 and the signal is received through the touch unit 210. A circuit unit 230 for outputting a transmission signal for this, and a transmission antenna 240 disposed between the plurality of conductive fiber strands 202 and transmitting the transmission signal output from the circuit unit 230 to the touch screen panel 100 ) and the like.

The conductive fiber strand 202 is not particularly limited as long as it is made of a material capable of smoothly passing microcurrent. For example, each of the conductive fiber strands 202 may be made of a component such as copper, tin, silver, nickel, or aluminum, and preferably may be made of a conductive thread including carbon having excellent conductivity and low cost.

On the other hand, the circuit unit 230 according to the embodiment of the present invention is a conductive fiber strand corresponding to the conductor 241 of the transmission antenna 240 and the reception antenna through the connection unit 222 formed inside the body 220. 202) can be connected. Specifically, the plurality of conductive fiber strands 202 are coupled to one end of the connection portion 222 made of a conductive material to receive a signal from the touch screen panel 100 and transmit the signal to the circuit unit 230 connected to the other end of the connection portion 222. can

The transmission antenna 240 is a conductor 241 formed in a form protruding from the conductive fiber strands 202, and portions other than the protruding portion are made of a predetermined insulating material to minimize interference with the conductive fiber strands 202. It may have a structure surrounded by the enclosing portion 242 made of.

In addition, as shown in FIG. 3, the covering part 242 of the transmission antenna 240 is connected to the circuit part 230 and wraps the outside of the conductor 241 receiving and transmitting the transmission signal. It may be composed of an insulator 242a, a ground shielding portion 242b surrounding the first insulator 242a, and a second insulator 242c surrounding the ground shielding portion 242b.

In particular, in the embodiment of the present invention, the conductor 241 is formed to protrude beyond the conductive fiber strands 202, and the first insulator 242a, the ground shielding portion 242b, and the second insulator 242c protrude. It may have a structure that surrounds only the conductor 241 corresponding to the remaining portion except for the portion.

The circuit unit 230 according to an embodiment of the present invention includes an amplification unit 232 that amplifies a signal received through a reception antenna composed of conductive fiber strands 202, and a signal amplified by the amplification unit 232 (e.g., voltage value) may include a comparator 234 that outputs an output to the transmission antenna 240 when the predetermined threshold value (eg, reference voltage) or more.

On the other hand, as shown in FIG. 4, the circuit unit 230 according to an embodiment of the present invention amplifies the signal received from the conductive fiber strand 202 through the amplification unit 232, and then amplifies it through short-range wireless communication, for example, It can be transmitted to an electronic device 300 having a touch screen panel 100 connected via Bluetooth, Bluetooth Le, or the like.

To this end, the circuit unit 230 according to the embodiment of the present invention converts the signal received from the touch screen panel 100 through the conductive fiber strand 202 and amplified by the amplification unit 232 into a digital signal and outputs the signal. An A/D conversion module 236 and a communication module 238 that modulates digital signals into a form capable of short-range wireless communication and transmits them to the electronic device 300 connected to the brush-type active stylus pen 200 and short-range wireless communication. can include

Through this configuration, the electronic device 300 may receive a digital signal through interworking with the communication module 238 of the circuit unit 230 to recognize additional information about the touch position, for example, pen pressure information.

That is, the electronic device 300 receives a signal for transmission through the touch screen panel 100, detects the touch position, and uses the digital signal received from the brush-type active stylus pen 200 connected through short-range wireless communication to apply pen pressure. After detecting information, a memory (not shown) may be provided in which an application 310 capable of processing user input by the brush-type active stylus pen 200 based on the detected information is stored.

In an embodiment of the present invention, examples of the application 310 in the electronic device 300 include drawing, document creation, and the like. In this case, the application 310 software detects pen pressure information based on the digital signal received through the circuit unit 230, and based on the pen pressure information, determines the contact area of the brush-type active stylus pen 200 with respect to the touch position. You can process user input in a computational way.

The operation process of the brush-type active stylus pen 200 having the above structure will be described below.

First, as the brush-type active stylus pen 200 touches a point on the touch screen panel 100, the amplifier 232 of the circuit unit 230 corresponds to an antenna for receiving the brush-type active stylus pen 200. A signal generated from the touch screen panel 100 may be received through the conductive fiber strand 202, and the received signal may be amplified and then transmitted to the comparator 234 and the A/D conversion module 236.

The comparator 234 compares the reference voltage applied from the built-in battery (not shown) with the amplified signal to output a signal for transmission, and outputs the signal for transmission through the antenna 240 for transmission to the touch screen panel. (100) can be provided. That is, the comparator 234 may output a signal for transmission as the amplified signal equal to or higher than the reference voltage is applied from the amplifier 232 .

Accordingly, the transmission signal transmitted through the transmission antenna 240 is provided to the read-out circuit via the sensing line of the touch screen panel 100, so that the touch screen panel 100 is provided by the touch sensing system. A touch coordinate, that is, a location where the brush-type active stylus pen 200 touches may be calculated.

As described above, when the touch unit 210 made of the conductive fiber strands 202 is touched, even if a minute current is received by the touch screen panel 100 through the touch unit 210, it passes through the amplification unit 232. The touch recognition rate of the brush-type active stylus pen 200 can be increased by amplifying a signal equal to or greater than a set value and providing the amplified signal to the touch screen panel 100 through the antenna 240 for transmission.

In addition to recognizing the touch position through the above-described operation, the brush-type active stylus pen 200 according to the embodiment of the present invention is a signal amplified by the amplifier 232 through the A/D conversion module 236. By converting to a digital signal and transmitting the digital signal to the electronic device 300 connected through short-range wireless communication through the communication module 238, various inputs of the user for the touch position can be processed.

Specifically, the application 310 stored in an executable form in the memory of the electronic device 300 may detect pen pressure information using the received digital signal and process a user input based on the pen pressure information.

For example, if the application 310 is software for inputting text into the electronic device 300 having the touch screen panel 100, the application 310 transmits a signal received from the touch screen panel 100. After detecting the user's touch position and detecting the pen pressure information using the digital signal received through short-range wireless communication, the character input at the touch position by the user is processed to have a predetermined thickness based on the pen pressure information. can

In particular, in the input system using the brush-type active stylus pen 200 according to the embodiment of the present invention, the application 310 of the electronic device 300 receives the transmission signal transmitted from the transmission antenna 240. Information on a touch point, for example, pen pressure information, may be detected using a digital signal received from the brush-type active stylus pen 200 connected through short-range wireless communication, and then the user's input may be processed.

The above description of the present application is for illustrative purposes, and those skilled in the art will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present application. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present application. .

100: touch screen panel
200: brush type active stylus pen
202: conductive fiber strand
210: touch unit
220: body
230: circuit part
240: antenna for transmission
300: electronic devices
310: application

Claims (8)

In a brush-type active stylus pen that operates in conjunction with a touch screen panel having a detection circuit for detecting a touch point,
a touch unit composed of a plurality of conductive fiber strands and operating as a reception antenna for receiving a signal from the touch screen panel as it is touched or approached on the touch screen panel;
a circuit unit for outputting a transmission signal corresponding thereto as the signal is received through the reception antenna;
A brush-type active stylus pen having a transmission antenna for transmitting a transmission signal output from the circuit unit to the touch screen panel.
According to claim 1,
The transmission antenna,
A brush-type active stylus pen disposed between the plurality of conductive fiber strands and connected to the circuit unit.
According to claim 2,
The transmission antenna,
A brush-type active stylus pen, which is a conductor formed in a form protruding from the plurality of conductive fiber strands and coated with a predetermined insulating material to minimize interference with the conductive fiber strands except for the protruding portion.
According to claim 2,
The transmission antenna,
A conductor connected to the circuit unit to receive and transmit a transmission signal output from the circuit unit;
A first insulator surrounding the outside of the conductor;
a ground shielding portion surrounding the outside of the first insulator;
A brush-type active stylus pen composed of a second insulator surrounding the outside of the ground shielding part.
According to claim 4,
The conductor,
It is formed in a form protruding from the plurality of conductive fiber strands,
The brush-type active stylus pen wherein the first insulator, the ground shielding part, and the second insulator cover only the remaining portion except for the protruding portion.
According to claim 2,
The circuit part,
an amplifier for amplifying the signal received through the reception antenna;
A brush-type active stylus pen comprising a comparator outputting the signal to the transmission antenna when the signal amplified by the amplification unit is equal to or greater than a preset threshold.
In a brush-type active stylus pen that operates in conjunction with a touch screen panel having a detection circuit for detecting a touch point,
a touch unit composed of a plurality of conductive fiber strands and operating as a reception antenna for receiving a signal from the touch screen panel as it is touched or approached on the touch screen panel;
an amplifier for amplifying and outputting the signal as the signal is received through the receiving antenna;
a transmission antenna for receiving and outputting a transmission signal corresponding to the signal as the signal is received through the reception antenna;
a comparator for applying the transmission signal to the transmission antenna when the signal amplified by the amplifier is equal to or greater than a preset threshold;
An A/D conversion module for converting the signal output by the amplifier into a digital signal;
A brush-type active stylus pen comprising a communication module for transmitting the digital signal to a device having a touch screen panel connected by short-range wireless communication.
A brush-type active stylus pen according to claim 7,
The device,
An input system using a brush-type active stylus pen having an application that obtains pen pressure information using the received digital signal and then processes an input of the brush-type active stylus pen based on the acquired pen pressure information.

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