# US 2019/0171920 A1 · Magnetic stripe data transmission device and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0171920 A1 - Document ID: US20190171920A1 - Status: Published application - Kind: A1 - Application number: 16/092,705 - Filed: 2017-05-10 - Published: 2019-06-06 - Earliest claimed: 2016-05-10 - Assignees: Samsung Electronics Co.Ltd. - Applicants: Samsung Electronics Co.Ltd. - Inventors: Junsig KUM; Nikolay OLYUNIN; Youngju LEE; Jungyub LEE; Dohyuk HA - Web page: https://patentgrep.com/patent/US20190171920A1 ## CPC - G06K 19/06206: {the magnetic marking being emulated} - G06F 21/31: User authentication - G06K 7/087: {flux-sensitive, e.g. magnetic, detectors (G06K7/10336 takes precedence)} - G06Q 20/204: {comprising interface for record bearing medium or carrier for electronic funds transfer or payment credit} - G06Q 20/3278: {RFID or NFC payments by means of M-devices} - G07F 7/086: {by passive credit-cards adapted therefor, e.g. constructive particularities to avoid counterfeiting, e.g. by inclusion of a physical or chemical security-layer (for security documents G07D7/00; for the reading of record-carriers in general G06K7/00; for the design of coded credit-cards G06K19/10)} - G07F 7/0893: {the card reader reading the card in a contactless manner} - H04B 5/24: Inductive coupling - H04B 5/26: using coils - H04B 5/43: Antennas - Y02D 30/70: in wireless communication networks - G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06Q: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR - G07F: COIN-FREED OR LIKE APPARATUS (coin sorting G07D3/00; coin testing G07D5/00; {handling coins or paper currencies apart from payment activated apparatus G07D; payment architectures, schemes or protocols G06Q20/00}) - H04B: TRANSMISSION - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract The present invention relates to a device for transmitting data and, particularly, to a device for transmitting data by using a magnetic stripe method. According to one embodiment of the present invention, the magnetic stripe data transmission device comprises: a coil to which a current is supplied in a first direction and a second direction, which is opposite to the first direction; a core for inducing a magnetic field when the current is supplied to the coil; a power source for supplying the current to the coil; driving units for intermittently supplying, to the coil, in the first direction or the second direction, a burst pulse or pseudo-burst pulse current supplied from the power source; and a control unit for outputting, to the driving units, a control signal in order to perform control such that the current is supplied to the coil alternately in the first direction and the second direction, wherein the core can be made of a material having an aspect ratio value of at least 0.5, having a coercivity value of 1000-10,000 [A/m], and having pseudo-hard magnetic density of which the saturated magnetic flux density value is at least 1 [T]. ## Claims ### Claim 1 A device for magnetic stripe data transmission comprising: a coil to which current is supplied in a first direction and a second direction that is opposite to the first direction; a core configured to inducing a magnetic field when the current is supplied to the coil; a power source configured to supplying the current to the coil; driving circuits configured to intermittently supply a burst pulse or similar burst pulse current supplied from the power source to the coil in the first direction or the second direction; and a controller configured to output to the driving circuits a control signal for controlling the current to be supplied to the coil alternately in the first direction and the second direction, wherein the core is made of a material having a squareness ratio of 0.5 or more, having a coercivity value of 1000 to 10000 [A/m], and having a semi hard magnetic density having a saturated magnetic flux density value of 1 [T] or more. ### Claim 2 (depends on 1) The device of claim 1, wherein the coil is wired on the core, or is slice-printed on the core in a spiral pattern. ### Claim 3 (depends on 1) The device of claim 1, wherein the core further comprises a second core having a soft magnetic density, magnetic fields induced in the first core having a hard magnetic density and the second core having the soft magnetic density are coupled to each other within a distance in which an organic interaction is possible, and the second core has a coercivity value that is equal to or larger than 10 [A/m] and smaller than 1000 [A/m], and has a saturated magnetic flux density value that is smaller than 1.5 [T]. ### Claim 4 (depends on 3) The device of claim 3, wherein the coil is wired to surround the first core or a junction portion of the first core and the second core. ### Claim 5 (depends on 3) The device of claim 3, wherein the coil is slice-printed on at least one of the first core and the second core in a spiral pattern. ### Claim 6 (depends on 1) The device of claim 1, further comprising a low-pass filter connected between the power source and the driving circuit. ### Claim 7 (depends on 1) The device of claim 1, further comprising a current adjustment circuit configured to adjust, if the burst pulse or similar burst pulse current is blocked after being supplied to the coil, the current so that the current is gradually attenuated to be blocked for a predetermined first time from a falling edge of the burst pulse or similar burst pulse current. ### Claim 8 (depends on 7) The device of claim 7, wherein the current adjustment circuit adjusts a current flow in the form of stairs having a falling edge every second time that is shorter than the first time. ### Claim 9 (depends on 7) The device of claim 7, wherein the current adjustment circuit comprises a capacitor connected between the coil and one of the driving circuits. ### Claim 10 (depends on 9) The device of claim 9, wherein the current adjustment circuit further comprises a resistor connected in parallel to the capacitor. ### Claim 11 (depends on 1) The device of claim 1, wherein the driving circuits comprise a first driving circuit and a second driving circuit, wherein the first driving circuit is configured so that a first switch and a second switch are connected in series to each other, the current is supplied to the first switch, one side of the second switch is grounded, one side of the coil is connected to a contact at which the first switch and the second switch are connected in series to each other, and the current direction and discontinuous current supply are performed based on turn-on and turn-off operations of the first switch and the second switch, and the second driving circuit is configured so that a third switch and a fourth switch are connected in series to each other, the current is supplied to the third switch, one side of the fourth switch is grounded, the other side of the coil is connected to a contact at which the third switch and the fourth switch are connected in series to each other, and the current direction and discontinuous current supply are performed based on turn-on and turn-off operations of the third switch and the fourth switch. ### Claim 12 A device for magnetic stripe data transmission comprising: a coil to which current is supplied in a first direction and a second direction that is opposite to the first direction; a current adjustment circuit configured to adjust, if a burst pulse or similar burst pulse current is supplied to the coil, the current so that the current is gradually attenuated for a predetermined time from a falling edge of the current; a power source configured to supplying the current to the coil; driving circuits configured to intermittently supply the burst pulse or similar burst pulse current supplied from the power source to the coil in the first direction or the second direction; and a controller configured to output to the driving circuits a control signal for controlling the current to be supplied to the coil alternately in the first direction and the second direction, wherein the current adjustment circuit includes a capacitor connected in series to the coil. ### Claim 13 (depends on 12) The device of claim 12, wherein the current adjustment circuit further comprises a resistor connected in parallel to the capacitor. ### Claim 14 (depends on 12) The device of claim 12, wherein the controller is configured to adjust current attenuation of the current adjustment circuit by controlling a value of the capacitor corresponding to a power capacity remaining in a battery of the device through reading of the capacitor value. ### Claim 15 A device for magnetic stripe data transmission comprising: a coil to which current is supplied in a first direction and a second direction that is opposite to the first direction; a power source configured to supplying the current to the coil; a current adjustment circuit configured to adjust, when a burst pulse or similar burst pulse current is blocked after being intermittently supplied to the coil, the current so that the current is attenuated and blocked in the form of stairs having a falling edge every second time that is shorter than a predetermined first time from the falling edge of the burst pulse or similar burst pulse current; driving circuits configured to supply the burst pulse or similar burst pulse current intermittently supplied from the power source to the coil in the first direction or the second direction; and a controller configured to output a control signal for controlling the current to be supplied to the coil in the burst pulse or similar burst pulse form alternately in the first direction and the second direction. ### Claim 16 (depends on 12) The device of claim 12, wherein the controller is configured to adjust current attenuation of the current adjustment circuit by controlling the second time unit, a power attenuation width, or both the second time unit and the power attenuation width corresponding to a power capacity remaining in a battery of the device. ### Claim 17 A method for transmitting data in an electronic device having a device for magnetic stripe data transmission, comprising: checking a battery capacity of the electronic device in case where the magnetic stripe data transmission is required; reading a predetermined current adjustment value from a memory corresponding to the battery capacity; transmitting data at a rising edge of intermittently flowing current during the magnetic stripe data transmission; and applying a current attenuation rate in accordance with the current adjustment value read at a falling edge of the intermittently flowing current. ### Claim 18 (depends on 17) The method of claim 17, wherein the current adjustment value adjusts a current attenuation time at a falling edge of the intermittent current through a value of a capacitor connected in series to a coil of the device for magnetic stripe data transmission. ### Claim 19 (depends on 17) The method of claim 17, wherein the current adjustment value comprises a second time unit shorter than a first predetermined time, a current reduction width every second time unit, or both the second time and the current reduction width for the first time from a falling edge of the intermittent current in the device for magnetic stripe data transmission. ### Claim 20 (depends on 13) The method of claim 13, further comprising: displaying data to be transmitted if a magnetic stripe type data transmission is required; performing authentication for data transmission selected when a selection signal of the data to be transmitted through a user input unit is received; and transmitting magnetic stripe data only in case where the authentication has succeeded.