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公开(公告)号：US20240046834A1
公开(公告)日：2024-02-08
申请号：US18382139
申请日：2023-10-20
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Sung Chun PARK , Yoon Young LEE
CPC classification number: G09G3/20 , H02M3/158 , H02M1/32 , 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 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：US20230336080A1
公开(公告)日：2023-10-19
申请号：US18341472
申请日：2023-06-26
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：US20200302849A1
公开(公告)日：2020-09-24
申请号：US16895510
申请日：2020-06-08
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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公开(公告)号：US20230318458A1
公开(公告)日：2023-10-05
申请号：US18153132
申请日：2023-01-11
Applicant: SAMSUNG DISPLAY CO ., LTD.
Inventor： Yoon Young LEE , Sung Chun PARK
IPC: H02M3/158 , H02M1/00 , H02M1/088 , G09G3/3233
CPC classification number: H02M3/1584 , H02M1/0009 , H02M1/088 , G09G3/3233 , G09G2300/0842 , G09G2300/0819 , G09G2330/021 , G09G2330/028 , G09G2320/0247
Abstract: A power provider includes: first, second, and third inductors; a first transistor connected to the second inductor; a second transistor connected to the third inductor; and a power integrated chip (IC) including input terminals connected to the first, second, and third inductors, and an output terminal connected to a power line. The power provider may supply the power voltage using the first inductor and the power IC when power current is less than a first reference value, supply the power voltage using the second inductor, the first transistor, and the power IC when the power current is greater than the first reference value and less than a second reference value, and supply the power voltage using the second and third inductors, the first and second transistors, and the power IC when the power current is greater than the second reference value.
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公开(公告)号：US20210389793A1
公开(公告)日：2021-12-16
申请号：US17155061
申请日：2021-01-21
Applicant: Samsung Display Co., Ltd.
Inventor： Eun Ryeol BAEK , Yoon Young LEE
IPC: G06F1/10 , G06F1/08 , G06F1/12 , G06F1/3206
Abstract: A display device includes: a display panel including scan lines, a first power line, a second power line, and pixels connected to the scan lines and the first and second power lines; a gate driver to sequentially provide scan signals to the scan lines based on a clock signal; and a power supply including transistors to convert an input power voltage into a first power voltage through a switching operation of the transistors and to supply the first power voltage to the first power line through a first output terminal. In response to an amount of current flowing through the pixels being less than a first reference current amount, the power supply is configured to change one or more of an off-duty of at least one of the transistors, a channel capacitance of at least one of the transistors, a switching frequency of at least one of the transistors, and a slew rate of at least one of control signals for the transistors.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20210312848A1
公开(公告)日：2021-10-07
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：US20210366341A1
公开(公告)日：2021-11-25
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 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：US20210264834A1
公开(公告)日：2021-08-26
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：US20200294438A1
公开(公告)日：2020-09-17
申请号：US16889782
申请日：2020-06-01
Applicant: Samsung Display Co., Ltd.
Inventor： Yoon Young LEE , Sungchun PARK
IPC: G09G3/20
Abstract: A display device includes: a display panel; a power management circuit configured to: perform a short detection operation with a first short detection condition during a start-up operation; supply first and second power supply voltages in the normal mode; and stop supplying the first and second power supply voltages in the low power mode; and a display driver configured to provide a first image signal in the normal mode and a second image signal for in the low power mode, the display driver comprising a power block configured to supply first and second standby power supply voltages in the low power mode, wherein, in a transition frame between the low power mode and the normal mode, the display driver provides the second image signal for the standby image to the display panel, and the power management circuit performs the short detection operation with a second short detection condition.
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公开(公告)号：US20200279514A1
公开(公告)日：2020-09-03
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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