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公开(公告)号：US20220189367A1
公开(公告)日：2022-06-16
申请号：US17502253
申请日：2021-10-15
Applicant: Samsung Display Co., Ltd.
Inventor： KWANGHUN KANG , SUNGCHUN PARK
Abstract: A voltage converter includes a first switching element, a second switching element, and a forced maintaining circuit. The first switching element is configured to operate based on a switching control signal. The second switching element is connected to the first switching element. The second switching element is configured to operate based on the switching control signal in a synchronous mode and operate in a diode mode in an asynchronous mode. The forced maintaining circuit is connected to the second switching element and configured to maintain the asynchronous mode for a forced maintaining period after entering the asynchronous mode.
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公开(公告)号：US20240296790A1
公开(公告)日：2024-09-05
申请号：US18369842
申请日：2023-09-19
Applicant: Samsung Display Co., Ltd.
Inventor： JEONGMIN SEO , SUNGCHUN PARK
IPC: G09G3/3208 , H02H1/00 , H02H7/20 , H02M3/158
CPC classification number: G09G3/3208 , H02H1/0007 , H02H7/20 , H02M3/158 , G09G2310/08 , G09G2330/02 , G09G2330/04
Abstract: Disclosed is a display device which includes a voltage generator including a first converter that generates a first voltage using an input voltage and is shut down in response to a shutdown signal and a short circuit protection part including a first short circuit protection part that compares an output voltage of an output terminal of the first converter with a first reference voltage and outputs the shutdown signal. The first converter pre-charges the output voltage to a predetermined voltage level during a first period, maintains a level of the output voltage during a second period subsequent to the first period, and boosts and outputs the output voltage as the first voltage during a third period subsequent to the second period. The first short circuit protection part outputs the shutdown signal when the output voltage in the second period has a level lower than that of the first reference voltage.
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公开(公告)号：US20200312219A1
公开(公告)日：2020-10-01
申请号：US16901229
申请日：2020-06-15
Applicant: Samsung Display Co., Ltd.
Inventor： SUNGCHUN PARK
Abstract: A DC-DC converter includes: a first converter including a pass transistor coupled between the first node and a first output, and a body diode connected in parallel to the pass transistor; a sensor coupled between both ends of the pass transistor and which detects a driving current; and a second converter which outputs a second power voltage lower than the first power voltage to a second output. The second converter includes a master inverting converter which outputs the second power voltage independently of the driving current, a slave inverting converter which outputs the second power voltage when the driving current is greater than a predetermined threshold or when the input power voltage is greater than a predetermined boosting voltage limit, and an inverting converter controller which controls operations of the master and slave inverting converters in first and second drive modes based on the driving current and the input power voltage.
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公开(公告)号：US20240305195A1
公开(公告)日：2024-09-12
申请号：US18388834
申请日：2023-11-11
Applicant: Samsung Display Co., LTD.
Inventor： JEONGMIN SEO , SUNGCHUN PARK
CPC classification number: H02M3/158 , G09G3/20 , H02M1/0032 , H02M1/32 , G09G2330/021 , G09G2330/028
Abstract: A direct current to direct current converter includes a switcher which generates an output voltage based on an external input voltage, and a controller which controls the switcher based on a pulse width modulation signal. The controller counts the number of switching of the pulse width modulation signal in a pulse skip mode of a low-power mode, generate a count value, and determines a short circuit defect when the count value is equal to or greater than a reference count value.
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公开(公告)号：US20180212513A1
公开(公告)日：2018-07-26
申请号：US15865857
申请日：2018-01-09
Applicant: Samsung Display Co., Ltd.
Inventor： SUNGCHUN PARK
CPC classification number: H02M3/06 , G01R31/024 , G06F3/147 , G09G3/20 , G09G3/2092 , G09G3/3208 , G09G2310/0278 , G09G2330/028 , H02J7/0047 , H02M1/32 , H02M3/10 , H02M3/156 , H02M2001/008 , H02M2001/325
Abstract: A direct current to direct current converter includes a first voltage converting circuit which converts an input voltage into a first power supply voltage, a control block which stores information about voltage levels of a second power supply voltage, receives an external control signal, and generates a voltage level selection signal indicating a first one of the voltage levels, a second voltage converting circuit which converts the input voltage into the second power supply voltage having the first one indicated by the voltage level selection signal, and an abnormal state detector which detects an abnormal state of a display panel, and provides a current limit signal to the control block when the abnormal state is detected. In response to the current limit signal, the control block generates the voltage level selection signal indicating a second one of the voltage levels regardless of the external control signal.
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Patent Agency Ranking
公开(公告)号：US20240290236A1
公开(公告)日：2024-08-29
申请号：US18655323
申请日：2024-05-06
Applicant: Samsung Display Co., Ltd.
Inventor： JIN-TAEK HONG , SUNGCHUN PARK
CPC classification number: G09G3/20 , H02H1/0007 , H02H7/12 , H02M1/0009 , H02M3/158 , G09G2330/021 , G09G2330/04
Abstract: A power management circuit is disclosed that includes a boost converter, a pass transistor, and an overcurrent detect circuit. The boost converter is configured to convert an input voltage into a first power supply voltage. The pass transistor is configured to transfer the first power supply voltage as a second power supply voltage after a predetermined time from a time point at which the first power supply voltage is activated. The overcurrent detect circuit is configured to perform an overcurrent detect operation by sensing a current flowing through the pass transistor. A display device is also disclosed that includes the power management circuit.
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公开(公告)号：US20240258922A1
公开(公告)日：2024-08-01
申请号：US18629361
申请日：2024-04-08
Applicant: Samsung Display Co., LTD.
Inventor： YANGUK NAM , SUNGCHUN PARK
CPC classification number: H02M3/158 , G09G3/2096 , G09G2330/021 , G09G2330/028
Abstract: A power voltage generator includes: an input voltage providing part outputting input voltage based on a first signal; an inductor receiving the input voltage to generate an inductor current and connected to an outputting part; the outputting part generating an output voltage based on the inductor current and generating a feedback voltage; an output sensing part sensing the output voltage based on a second signal and generating an output sensing voltage; a peak voltage generator generating a peak voltage based on the input voltage, set data corresponding to an output set voltage, and ripple data corresponding to a ripple set voltage; a first comparing part generating a stop signal based on the output sensing and peak voltages; a second comparing part generating a start signal based on the set data and feedback voltage; and a switch controller generating the first and second signals based on the start and stop signals.
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公开(公告)号：US20180233078A1
公开(公告)日：2018-08-16
申请号：US15865903
申请日：2018-01-09
Applicant: Samsung Display Co., Ltd.
Inventor： SUNGCHUN PARK
CPC classification number: G09G3/30 , G09G3/20 , G09G2320/029 , G09G2330/021 , G09G2330/028 , H02M1/36 , H02M3/158 , H02M3/1584 , H02M2001/0019 , H02M2001/0022 , H02M2001/008 , H02M2003/1557
Abstract: A DC-DC converter includes: a first converter including a pass transistor coupled between the first node and a first output, and a body diode connected in parallel to the pass transistor; a sensor coupled between both ends of the pass transistor and which detects a driving current; and a second converter which outputs a second power voltage lower than the first power voltage to a second output. The second converter includes a master inverting converter which outputs the second power voltage independently of the driving current, a slave inverting converter which outputs the second power voltage when the driving current is greater than a predetermined threshold or when the input power voltage is greater than a predetermined boosting voltage limit, and an inverting converter controller which controls operations of the master and slave inverting converters in first and second drive modes based on the driving current and the input power voltage.
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公开(公告)号：US20250030344A1
公开(公告)日：2025-01-23
申请号：US18762847
申请日：2024-07-03
Applicant: Samsung Display Co., LTD.
Inventor： SUNGCHUN PARK , JEONGMIN SEO , YOON YOUNG LEE
Abstract: A DC-DC converter includes: a master converter configured to operate to generate a panel power voltage based on an input voltage regardless of a panel current, and a slave converter configured to operate to generate the panel power voltage with the master converter based on the input voltage when the panel current is greater than a reference current. The master converter and the slave converter are connected to a first inductor.
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公开(公告)号：US20240249669A1
公开(公告)日：2024-07-25
申请号：US18545165
申请日：2023-12-19
Applicant: Samsung Display Co., LTD.
Inventor： YOON YOUNG LEE , SUNGCHUN PARK
IPC: G09G3/32 , G09G3/3291
CPC classification number: G09G3/32 , G09G3/3291 , G09G2310/0275 , G09G2330/021 , G09G2330/028 , G09G2330/04
Abstract: A power manager includes a first driving voltage generator which supplies a first driving voltage to a first power line and a second driving voltage generator which supplies a second driving voltage to a second power line, where a voltage level of the second driving voltage is lower than a voltage level of the first driving voltage. During an initial driving period in which the first driving voltage is supplied to the first power line and before the second driving voltage is supplied to the second power line, the second driving voltage generator senses a voltage of the second power line, and a supply of the first driving voltage is controlled based on the voltage of the second power line.
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