# US 11,307,678 B2 · Electronic pen, electronic device, and method of controlling the same

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- Number: US 11,307,678 B2
- Document ID: US11307678B2
- Status: Granted
- Kind: B2
- Application number: 17/286,454
- Filed: 2019-10-18
- Published: 2021-12-16
- Granted: 2022-04-19
- Earliest claimed: 2018-10-19
- Assignees: Neolab Convergence Inc.
- Applicants: Neolab Convergence Inc.
- Inventors: Sang Gyu Lee; Ji Wan Park; Bong Ki Park; Sung Hoon Ha; Sang Ho Kim; Sang Won Cho
- Web page: https://patentgrep.com/patent/US11307678B2

## CPC

- G06F 3/03542: {Light pens for emitting or receiving light}
- G06F 3/03545: {Pens or stylus}
- G06F 3/0304: {Detection arrangements using opto-electronic means (constructional details of pointing devices not related to the detection arrangement using opto-electronic means G06F3/033; optical digitisers G06F3/042)}
- G06F 3/0321: {by optically sensing the absolute position with respect to a regularly patterned surface forming a passive digitiser, e.g. pen optically detecting position indicative tags printed on a paper sheet (constructional details of pen-shaped pointing devices G06F3/03545, G06F3/03542, G06F3/037)}
- G06F 3/0383: {Signal control means within the pointing device}
- G06F 3/0386: {for light pen}
- G06F 3/04883: for inputting data by handwriting, e.g. gesture or text
- G06F 3/1423: {controlling a plurality of local displays, e.g. CRT and flat panel display}
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

According to one embodiment of the present invention, there is provided an electronic pen including a first pen module which includes a first pen core including a writing material used for a medium and a pattern sensing unit configured to acquire a handwritten image of a user in order for the electronic pen to acquire first location information that is location information of the electronic pen with respect to the medium, a second pen module which generates at least one of a magnetic field and an electronic field in order for the electronic pen to acquire second location information that is location information of the electronic pen with respect to an electronic device, a main body in which the first pen module is disposed at a first end portion thereof and the second pen module is fixed to at least one of the first end portion and a second end portion thereof and which has a cavity therein, and a control unit which generates a signal for controlling the first pen module and the second pen module.

## Claims

### Claim 1

An electronic pen comprising:
a first pen module including a first pen core and a pattern sensing unit,
wherein the first pen core contains a material used for writing which is used for a medium, and
wherein the pattern sensing unit is configured to obtain a handwritten image in order for the electronic pen to obtain first location information,
wherein the handwritten image is an image made by a user with the first pen core, and
wherein the first location information is defined as a location of the electronic pen with respect to the medium;
a second pen module including a second pen core,
wherein the second pen core is configured to generate at least one of a magnetic field and an electric field in order for an electronic device to obtain second location information, and
wherein the second location information is defined as a location of the electronic pen with respect to the electronic device;
a main body which has a cavity,
wherein the first pen module is disposed at a first end of the main body and the second pen module is fixed to at least one of the first end and a second end which is an opposite end of the main body,
wherein the first end includes a first pen core accommodating part and a light transmitting unit, and
wherein the first pen core is supported by being inserted into the first pen core accommodating part so that a part of the first pen core is exposed, and
wherein the pattern sensing unit is positioned and fixed coaxially with the light transmitting unit; and
a control unit which is configured to generate a signal for controlling the first pen module and the second pen module.

### Claim 2 (depends on 1)

The electronic pen according to claim 1, wherein the control unit is configured to generate pen data which is used to reproduce the user's writing on the medium based on the handwritten image.

### Claim 3 (depends on 1)

The electronic pen according to claim 1, wherein the second pen core includes a first electrode which generates a first electric field having a first effective distance,
wherein the second pen module includes a second electrode that is spaced apart from the first electrode pen core along a central axis of the main body in a direction to the first pen core, wherein the second electrode generates a second electric field having a second effective distance,
wherein the control unit is configured to further generate stylus data which includes angle information, and
wherein the angle information indicates an angle of the electronic pen with respect to the input surface of the electronic device.

### Claim 4 (depends on 1)

The electronic pen according to claim 1, further comprising a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is electrically connected to an unexposed end of the first pen core inside the main body to sense a first pressure which is applied to the first pen core,
wherein the second pressure sensor is disposed in the second pen module and electrically connected to the second pen core to sense a second pressure which is applied to the second pen core,
wherein the pen data further includes first pressure information which is information on the first pressure, and
wherein the stylus data includes second pressure information which is information on the second pressure.

### Claim 5 (depends on 4)

The electronic pen according to claim 4, further comprising a substrate connected to the pattern sensing unit, wherein the substrate comprises a first substrate and a second substrate,
wherein the first substrate is disposed close to the first end of the main body to which the first pen core is exposed, and
wherein the second substrate is disposed close to the second end of the main body.

### Claim 6 (depends on 4)

The electronic pen according to claim 4, further comprising a battery that supplies power to the first pen module and the second pen module.

### Claim 7 (depends on 6)

The electronic pen according to claim 6, wherein the control unit includes a first control unit which is configured to control power supply from the battery to the first pen module, and a second control unit which is configured to control power supply from the battery to the second pen module.

### Claim 8 (depends on 7)

The electronic pen according to claim 7, wherein the first control unit is disposed on the first substrate and
wherein the second control unit is disposed on the second substrate.

### Claim 9 (depends on 1)

The electronic pen according to claim 1, further comprising a cap and at least one magnet sensor, wherein the cap is inserted into at least one of the first end and the second end of the main body and has a predetermined inner space and a magnet to protect at least one of the first pen core and the second pen core, and
wherein at least one magnet sensor is disposed on at least one of the first end and the second end and capable of detecting the magnet.

### Claim 10 (depends on 4)

The electronic pen according to claim 4, further comprising a vibration unit which is mounted on the main body and configured to generate vibration when a predetermined condition is satisfied, wherein the predetermined condition is a state in which the pressure is sensed from the first pressure sensor while the writing image is not obtained by the pattern sensing unit.

### Claim 11 (depends on 1)

The electronic pen according to claim 1, wherein the first pen core is spaced apart from a center of a longitudinal axis of the main body to an outer surface of the main body and inserted into the main body,
wherein the second pen core is inserted into the second pen module in a direction to a center of the longitudinal axis of the main body, and
wherein a longitudinal axis of the first pen core and a longitudinal axis of the second pen core are spaced apart from each other.

### Claim 12 (depends on 1)

The electronic pen according to claim 1, further comprising at least one of a first display and a second display, wherein the first display is disposed on one side of the main body adjacent to the first end and outputs visible light based on information of the first pen module, and
wherein the second display is disposed on the other side of the main body adjacent to the second end and outputs visible light based on information of the second pen module.

### Claim 13 (depends on 12)

The electronic pen according to claim 12, wherein the information of the first pen module includes first color information recognized through the first pen module, and
wherein the information of the second pen module includes second color information recognized based on a first electric field transmitted from the second pen module.

### Claim 14 (depends on 12)

The electronic pen according to claim 12, wherein the control unit is configured to control at least one of the first display and the second display based on the user's input.