# US 2019/0356175 A1 · Wireless power device having plurality of transmission coils and driving method therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0356175 A1 - Document ID: US20190356175A1 - Status: Published application - Kind: A1 - Application number: 16/077,184 - Filed: 2017-02-02 - Published: 2019-11-21 - Earliest claimed: 2016-02-12 - Assignees: LG Innotek Co., Ltd. - Applicants: LG Innotek Co., Ltd. - Inventors: Min Young JO; Jong Heon LEE; Yong Suk CHAE - Web page: https://patentgrep.com/patent/US20190356175A1 ## CPC - H02J 50/402: {the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas} - H02J 50/10: using inductive coupling - H02J 50/80: involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices - H02J 50/90: involving detection or optimisation of position, e.g. alignment - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY ## Abstract A wireless power transmitter having a plurality of transmission coils is disclosed. The present transmitter comprises: first to Nth coils; and a control unit for transmitting, to a wireless power receiver, a first sensing signal through the first to Nth coils, and adjusting transmission orders of the first to Nth coils for transmitting a second sensing signal, on the basis of the signal strength of a received first signal strength indicator when the first signal strength indicator corresponding to the first sensing signal is received, wherein the control unit can transmit, to the receiver, the second sensing signal through the first to Nth coils on the basis of the adjusted transmission orders. Therefore, device efficiency and user convenience can be improved. ## Claims ### Claim at position 1 1-18. (canceled) ### Claim 19 A wireless power transmitter comprising: first to Nth coils configured to wirelessly transmit an alternating current power signal; and a controller configured to transmit a first sensing signal to a wireless power receiver via the first to Nth coils and, upon receiving a response signal including a signal strength indicator corresponding to the first sensing signal, adjust a transmission order for a second sensing signal to be transmitted via the first to Nth coils based on a strength of the response signal. ### Claim 20 (depends on 19) The wireless power transmitter according to claim 19, wherein the controller adjusts the transmission order for the second sensing signal when a wake time for triggering transmission of the response signal is set to be longer than a predetermined time. ### Claim 21 (depends on 19) The wireless power transmitter according to claim 19, wherein the controller adjusts the transmission order for the second sensing signal when a reset time for resetting the wireless power receiver is set to be longer than a predetermined time. ### Claim 22 (depends on 19) The wireless power transmitter according to claim 19, wherein the controller adjusts the transmission order for the second sensing signal so as to prevent a current value of the wireless power receiver from falling below a predetermined reference value during a reset time for resetting the wireless power receiver. ### Claim 23 (depends on 19) The wireless power transmitter according to claim 19, wherein the controller controls the second sensing signal so as to be transmitted via at least one coil that has received the response signal. ### Claim 24 (depends on 23) The wireless power transmitter according to claim 23, wherein the controller controls the second sensing signal so as to be transmitted in descending order of strength of the response signal by the coils when the response signal is received in a plural number via the first to Nth coils. ### Claim 25 (depends on 19) The wireless power transmitter according to claim 19, wherein the controller controls the first sensing signal so as to be simultaneously transmitted via the first to Nth coils for a predetermined period. ### Claim 26 (depends on 19) The wireless power transmitter according to claim 19, wherein the controller controls the first sensing signal so as to be transmitted in a predefined order of the first to Nth coils. ### Claim 27 (depends on 19) The wireless power transmitter according to claim 19, wherein the first sensing signal and the second sensing signal are digital ping signals defined in a WPC standard or a PMA standard. ### Claim 28 (depends on 19) The wireless power transmitter according to claim 19, wherein the first sensing signal and the second sensing signal have a difference in at least one of an output voltage strength, a transmission period, or a transmission time. ### Claim 29 A method of driving a wireless power transmitter, the method comprising: transmitting a first sensing signal via first to Nth coils provided in the wireless power transmitter; receiving a response signal including a first signal strength indicator corresponding to the first sensing signal; adjusting a transmission order for a second sensing signal via the first to Nth coils based on a strength of the received response signal; and transmitting the second sensing signal via the coils according to the adjusted transmission order. ### Claim 30 (depends on 29) The method according to claim 29, wherein the transmission order for the second sensing signal is adjusted when a wake time for triggering transmission of the response signal is set to be longer than a predetermined time. ### Claim 31 (depends on 29) The method according to claim 29, wherein the transmission order for the second sensing signal is adjusted when a reset time for resetting the wireless power receiver is set to be longer than a predetermined time. ### Claim 32 (depends on 29) The method according to claim 29, wherein the transmission order for the second sensing signal is adjusted so as to prevent a current value of the wireless power receiver from falling below a predetermined reference value during a reset time for resetting the wireless power receiver. ### Claim 33 (depends on 29) The method according to claim 29, wherein the second sensing signal is transmitted via at least one coil that has received the response signal. ### Claim 34 (depends on 33) The method according to claim 33, wherein the second sensing signal is controlled so as to be transmitted in descending order of strength of the response signal by the coils when the response signal is received in a plural number via the first to Nth coils. ### Claim 35 (depends on 29) The method according to claim 29, wherein the first sensing signal is simultaneously transmitted via the first to Nth coils for a predetermined period. ### Claim 36 (depends on 29) The method according to claim 29, wherein the first sensing signal is transmitted in a predefined order of the first to Nth coils. ### Claim 37 (depends on 29) The method according to claim 29, wherein the first sensing signal and the second sensing signal are digital ping signals defined in a WPC standard or a PMA standard. ### Claim 38 (depends on 29) The method according to claim 29, wherein the first sensing signal and the second sensing signal have a difference in at least one of an output voltage strength, a transmission period, or a transmission time.