# US 2021/0281174 A1 · Power provider and driving method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0281174 A1 - Document ID: US20210281174A1 - Status: Published application - Kind: A1 - Application number: 17/008,826 - Filed: 2020-09-01 - Published: 2021-09-09 - Earliest claimed: 2020-03-06 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Kwang Hun KANG - Web page: https://patentgrep.com/patent/US20210281174A1 ## CPC - H02M 3/158: including plural semiconductor devices as final control devices for a single load - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - H02M 1/32: Means for protecting converters other than automatic disconnection - H02M 1/36: Means for starting or stopping converters - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor - G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2330/021: Power management, e.g. power saving - G09G 2330/026: Arrangements or methods related to booting a display - G09G 2330/04: Display protection - G09G 2340/0435: Change or adaptation of the frame rate of the video stream - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract A power provider includes: a first power source configured to receive an input voltage and to provide a first power voltage to a first output terminal; a low voltage detection circuit configured to provide a low voltage detection signal of an enable level in response to the input voltage being less than a reference low voltage, and to provide the low voltage detection signal of a disable level in response to the input voltage being greater than the reference low voltage; a first soft start circuit configured to connect the first input terminal to the first output terminal in response to a first control signal for the first power source being changed from a disable level to an enable level; and a first boost converter configured to convert the input voltage to provide the first power voltage greater than the input voltage to the first output terminal. ## Claims ### Claim 1 A power provider comprising: a first power source configured to receive an input voltage from a first input terminal and to provide a first power voltage to a first output terminal; and a low voltage detection circuit configured to provide a low voltage detection signal of an enable level in response to the input voltage being less than a reference low voltage, and to provide the low voltage detection signal of a disable level in response to the input voltage being greater than the reference low voltage, wherein the first power source includes: a first soft start circuit configured to connect the first input terminal to the first output terminal during a first period in response to a first control signal for the first power source being changed from a disable level to an enable level; and a first boost converter configured to convert the input voltage to provide the first power voltage greater than the input voltage to the first output terminal after the first period, wherein the first boost converter is configured to stop the conversion of the input voltage in response to the low voltage detection signal being changed from the disable level to the enable level, and wherein the first soft start circuit is configured to connect the first input terminal to the first output terminal during a second period in response to the low voltage detection signal being changed from the enable level to the disable level. ### Claim 2 (depends on 1) The power provider of claim 1, wherein the first boost converter is configured to convert the input voltage to provide the first power voltage greater than the input voltage to the first output terminal after the second period. ### Claim 3 (depends on 2) The power provider of claim 2, further comprising: a second power source configured to convert the input voltage received by a second input terminal to provide a second power voltage less than the input voltage to a second output terminal during a third period between the first period and the second period; and a short-circuit detection circuit configured to stop an operation of the second power source in response to a voltage of the second output terminal being greater than a reference short-circuit voltage during a fourth period between the first period and the third period. ### Claim 4 (depends on 3) The power provider of claim 3, wherein the second power source is configured to convert the input voltage to provide the second power voltage less than the input voltage to the second output terminal during at least a portion of the second period. ### Claim 5 (depends on 3) The power provider of claim 3, further comprising: a register including information on a voltage level of the second power voltage, wherein the second power source is configured to determine the voltage level of the second power voltage referring to the information provided from the register in response to the low voltage detection signal being changed from the enable level to the disable level. ### Claim 6 (depends on 3) The power provider of claim 3, wherein the first soft start circuit includes a first switch having a first electrode connected to the first input terminal and a second electrode connected to the first output terminal. ### Claim 7 (depends on 6) The power provider of claim 6, wherein the first boost converter includes: a first inductor having one end connected to the first input terminal and the other end connected to a first node; a second switch having a first electrode connected to the first node and a second electrode connected to a ground power source; and a third switch having a first electrode connected to the first node and a second electrode connected to the first output terminal. ### Claim 8 (depends on 7) The power provider of claim 7, wherein the second power source includes: a fourth switch having a first electrode connected to the second input terminal and a second electrode connected to a second node; a second inductor having one end connected to the second node and the other end connected to the ground power source; and a fifth switch having a first electrode connected to the second node and a second electrode connected to the second output terminal. ### Claim 9 (depends on 8) The power provider of claim 8, further comprising: a third power source configured to receive the input voltage from a third input terminal and to provide a third power voltage to a third output terminal, wherein the third power source includes: a second soft start circuit configured to connect the third input terminal to the third output terminal during a fifth period in response to a second control signal for the third power source being changed from a disable level to an enable level; and a second boost converter configured to convert the input voltage to provide the third power voltage greater than the input voltage to the third output terminal after the fifth period, and wherein the third power voltage is greater than the first power voltage during the third period. ### Claim 10 (depends on 9) The power provider of claim 9, wherein the second boost converter is configured to stop the conversion of the input voltage in response to the low voltage detection signal being changed from the disable level to the enable level, and wherein the second soft start circuit is configured to connect the third input terminal to the third output terminal during a sixth period in response to the low voltage detection signal being changed from the enable level to the disable level. ### Claim 11 (depends on 10) The power provider of claim 10, wherein the second soft start circuit includes a sixth switch having a first electrode connected to the third input terminal and a second electrode connected to the third output terminal. ### Claim 12 (depends on 11) The power provider of claim 11, wherein the second boost converter includes: a third inductor having one end connected to the third input terminal and the other end connected to a third node; a seventh switch having a first electrode connected to the third node and a second electrode connected to the ground power source; and an eighth switch having a first electrode connected to the third node and a second electrode connected to the third output terminal. ### Claim 13 A power provider comprising: a first power source configured to convert an input voltage received from a first input terminal to provide a first power voltage greater than the input voltage to a first output terminal; a second power source configured to convert the input voltage received from a second input terminal to provide a second power voltage less than the input voltage to a second output terminal; and a low voltage detection circuit configured to provide a low voltage detection signal of an enable level in response to the input voltage being less than a reference low voltage, and to provide the low voltage detection signal of a disable level in response to the input voltage being greater than the reference low voltage, wherein the first power source and the second power source are configured to stop the conversion of the input voltage in response to the low voltage detection signal being changed from the disable level to the enable level, wherein the first power source is configured to increase a level of the first power voltage during a first period in response to the low voltage detection signal being changed from the enable level to the disable level, and wherein the second power source is configured to decrease a level of the second power voltage during at least a portion of the first period. ### Claim 14 (depends on 13) The power provider of claim 13, further comprising: a register including information on a voltage level of the second power voltage, wherein the second power source is configured to determine the voltage level of the second power voltage referring to the information provided from the register in response to the low voltage detection signal being changed from the enable level to the disable level. ### Claim 15 (depends on 14) The power provider of claim 14, further comprising: a third power source configured to convert the input voltage received from a third input terminal to provide a third power voltage greater than the input voltage to a third output terminal, wherein the third power source is configured to stop the conversion of the input voltage in response to the low voltage detection signal being changed from the disable level to the enable level, wherein the third power source is configured to increase a level of the third power voltage during a second period in response to the low voltage detection signal being changed from the enable level to the disable level, and wherein the level of the third power voltage after the first period and the second period has elapsed is greater than the level of the first power voltage. ### Claim 16 A driving method of a power provider, wherein the power provider includes: a first power source configured to receive an input voltage from a first input terminal and to provide a first power voltage to a first output terminal; and a low voltage detection circuit configured to provide a low voltage detection signal of an enable level in response to the input voltage being less than a reference low voltage, and to provide the low voltage detection signal of a disable level in response to the input voltage being greater than the reference low voltage, and wherein the driving method includes: connecting the first input terminal to the first output terminal during a first period in response to a first control signal for the first power source being changed from a disable level to an enable level; converting the input voltage to provide the first power voltage greater than the input voltage to the first output terminal after the first period; stopping the conversion of the input voltage by the first power source in response to the low voltage detection signal being changed from the disable level to the enable level; and connecting the first input terminal to the first output terminal during a second period in response to the low voltage detection signal being changed from the enable level to the disable level. ### Claim 17 (depends on 16) The driving method of claim 16, wherein the driving method further includes: converting the input voltage by the first power source to provide the first power voltage greater than the input voltage to the first output terminal after the second period. ### Claim 18 (depends on 17) The driving method of claim 17, wherein the power provider further includes a second power source configured to receive the input voltage from a second input terminal and to provide a second power voltage to a second output terminal, and wherein the driving method further includes: converting the input voltage received from the second input terminal by the second power source to provide the second power voltage less than the input voltage to the second output terminal during a third period between the first period and the second period; and stopping an operation of the second power source in response to a voltage of the second output terminal being greater than a reference short-circuit voltage during a fourth period between the first period and the third period. ### Claim 19 (depends on 18) The driving method of claim 18, wherein the driving method further includes: converting the input voltage by the second power source to provide the second power voltage less than the input voltage to the second output terminal during at least a portion of the second period. ### Claim 20 (depends on 19) The driving method of claim 19, wherein the power provider further includes a register including information on a voltage level of the second power voltage, and wherein the driving method further includes: determining the voltage level of the second power voltage by the second power source referring to the information provided from the register in response to the low voltage detection signal being changed from the enable level to the disable level.