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公开(公告)号：US12100351B2
公开(公告)日：2024-09-24
申请号：US18132785
申请日：2023-04-10
Applicant: Samsung Display Co., Ltd.
Inventor： Yoon Young Lee , Sungchun Park
IPC: G09G3/3233 , H02M3/145
CPC classification number: G09G3/3233 , H02M3/145 , G09G2330/028
Abstract: A DC-DC converter includes a first switching element, a second switching element, a first amplifier, a second amplifier, a Pulse Width Modulation (PWM) controller, an output inductor and a power compensator. The second switching element is connected to the first switching element. The first amplifier outputs a first switching control signal to control the first switching element. The second amplifier outputs a second switching control signal to control the second switching element. The PWM controller generates a control signal applied to input terminals of the first amplifier and the second amplifier. The output inductor includes a first terminal connected to the first switching element and the second switching element and a second terminal outputting the pixel power supply voltage. The power compensator receives an input voltage and adjusts a power supply voltage applied to a power supply terminal of the first amplifier.
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公开(公告)号：US11823604B2
公开(公告)日：2023-11-21
申请号：US18073999
申请日：2022-12-02
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Sung Chun Park , Yoon Young Lee
CPC classification number: G09G3/20 , H02M1/32 , H02M3/158 , G09G2330/021 , G09G2330/028 , H02M1/0032
Abstract: A direct current-to-direct current (“DC-DC”) converter includes: a first converter which outputs a first power voltage in a normal mode or a power saving mode based on a inductor current generated therein, where the first converter operates in a first driving manner in the normal mode, and operates in a second driving manner in the power saving mode; a second converter which outputs a second power voltage based on a inductor current generated therein, where the second converter operates in a third driving manner in the power saving mode, and a magnitude of the second power voltage in the power saving to mode is different from that in the normal mode; and a mode selector which supplies a mode control signal to the first and second converters, where the first and second converters are driven in the normal mode or the power saving mode based on the mode control signal.
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公开(公告)号：US11521533B2
公开(公告)日：2022-12-06
申请号：US17397053
申请日：2021-08-09
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Sung Chun Park , Yoon Young Lee
Abstract: A direct current-to-direct current (“DC-DC”) converter includes: a first converter which outputs a first power voltage in a normal mode or a power saving mode based on a inductor current generated therein, where the first converter operates in a first driving manner in the normal mode, and operates in a second driving manner in the power saving mode; a second converter which outputs a second power voltage based on a inductor current generated therein, where the second converter operates in a third driving manner in the power saving mode, and a magnitude of the second power voltage in the power saving mode is different from that in the normal mode; and a mode selector which supplies a mode control signal to the first and second converters, where the first and second converters are driven in the normal mode or the power saving mode based on the mode control signal.
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14.发明授权公开(公告)号：US11373572B2
公开(公告)日：2022-06-28
申请号：US17202568
申请日：2021-03-16
Applicant: Samsung Display Co., Ltd.
Inventor： Yoon Young Lee
IPC: G09G3/20
Abstract: A power management circuit includes a boost converter which generates a boosted voltage at a boosting node by boosting an input voltage by using a reference boosting voltage, a voltage regulator coupled to the boosting node and an output node, a bypass transistor coupled between the boosting node and the output node, and a regulator control block which compares the input voltage with a reference input voltage. When the input voltage is higher than or equal to the reference input voltage, the regulator control block increases the reference boosting voltage to increase the boosted voltage, enables the voltage regulator to generate a regulated voltage by regulating the increased boosted voltage, turns off the bypass transistor such that the regulated voltage is output as a pixel power supply voltage at the output node, and maintains an enable state of the voltage regulator for a minimum enable time.
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公开(公告)号：US12165555B2
公开(公告)日：2024-12-10
申请号：US18382139
申请日：2023-10-20
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Sung Chun Park , Yoon Young Lee
Abstract: A direct current-to-direct current (“DC-DC”) converter includes: a first converter which outputs a first power voltage in a normal mode or a power saving mode based on a inductor current generated therein, where the first converter operates in a first driving manner in the normal mode, and operates in a second driving manner in the power saving mode; a second converter which outputs a second power voltage based on a inductor current generated therein, where the second converter operates in a third driving manner in the power saving mode, and a magnitude of the second power voltage in the power saving mode is different from that in the normal mode; and a mode selector which supplies a mode control signal to the first and second converters, where the first and second converters are driven in the normal mode or the power saving mode based on the mode control signal.
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Patent Agency Ranking
公开(公告)号：US11689104B2
公开(公告)日：2023-06-27
申请号：US17745129
申请日：2022-05-16
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Yoon Young Lee
CPC classification number: H02M3/158 , G09G3/30 , H02M1/0009 , G09G2330/028
Abstract: An embodiment of the present disclosure provides a voltage converter including: an inductor in which a first electrode thereof receives an input voltage and a second electrode thereof is connected to a first node; a first transistor in which a first electrode thereof is connected to the first node and a second electrode thereof is connected to a second node providing an output voltage; a second transistor in which a first electrode thereof is connected to the first node and a second electrode thereof is connected to a reference terminal; and a current sensor connected to the first node and the second node, wherein the current sensor includes: a third transistor in which a first electrode thereof is connected to the first node and a second electrode thereof is connected to a third node; and a current mirror circuit that mirrors currents flowing through the second node, the third node, and a sensing terminal.
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公开(公告)号：US11605327B2
公开(公告)日：2023-03-14
申请号：US17121021
申请日：2020-12-14
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Yoon Young Lee
IPC: G09G3/20
Abstract: A display device includes a display panel which displays an image, a data driver which supplies a plurality of data signals to the display panel, a first power supply which supplies a data driving voltage to the data driver through a first power supply line, and a second power supply which supplies a first driving voltage to the display panel through a second power supply line. The first power supply senses a voltage of the second power supply line and controls the supply of the data driving voltage based on a sensed voltage during an initial driving period, in which the first power supply generates the data driving voltage and the second power supply does not generate the first driving voltage.
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公开(公告)号：US11227517B2
公开(公告)日：2022-01-18
申请号：US16799520
申请日：2020-02-24
Applicant: Samsung Display Co., Ltd.
Inventor： Yoon Young Lee , Sung Chun Park
Abstract: A vehicle display device includes a first display unit disposed in a first portion of a vehicle and including a first display panel to display a first image and a first power supply to supply a first power supply voltage to the first display panel, the first power supply configured to detect an abnormality of a signal output to the first display panel to generate a first shut-down control signal; a second display unit disposed in a second portion of the vehicle and including a second display panel to display a second image and a second power supply to supply a second power supply voltage to the second display panel, the second power supply configured to detect an abnormality of a signal output to the second display panel to generate a second shut-down control signal; a third display unit disposed in a third portion of the vehicle and configured to display a third image or at least one of the first and second images; and a controller to receive first image data corresponding to the first image, second image data corresponding to the second image, and third image data corresponding to the third image to provide the received first image data, the received second image data, and the received third image data to the first display unit, the second display unit, and the third display unit, respectively. The controller is configured to supply the first image data to the third display unit in response to the first shut-down control signal, and to supply the second image data to the third display unit in response to the second shut-down control signal.
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公开(公告)号：US10679540B2
公开(公告)日：2020-06-09
申请号：US16132905
申请日：2018-09-17
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Sung Chun Park , Yoon Young Lee
Abstract: A direct current-to-direct current (“DC-DC”) converter includes: a first converter which outputs a first power voltage in a normal mode or a power saving mode based on a inductor current generated therein, where the first converter operates in a first driving manner in the normal mode, and operates in a second driving manner in the power saving mode; a second converter which outputs a second power voltage based on a inductor current generated therein, where the second converter operates in a third driving manner in the power saving mode, and a magnitude of the second power voltage in the power saving to mode is different from that in the normal mode; and a mode selector which supplies a mode control signal to the first and second converters, where the first and second converters are driven in the normal mode or the power saving mode based on the mode control signal.
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公开(公告)号：US20200175906A1
公开(公告)日：2020-06-04
申请号：US16667208
申请日：2019-10-29
Applicant: Samsung Display Co., Ltd.
Inventor： Yoon Young Lee , Sung Chun Park
IPC: G09G3/20
Abstract: A display device includes a display panel to display an image, a data driver to supply a data signal to the display panel, and a power supply to supply a driving voltage to the display panel through a power supply line and to supply a data driving voltage to the data driver, in which the power supply is configured to detect a voltage of the power supply line during an initial driving period during which the data driving voltage is supplied to the data driver, to supply a ground voltage to the display panel when the voltage detected from the power supply line is different from a reference voltage, and to supply the driving voltage to the power supply line after the initial driving period.
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