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1.发明申请公开(公告)号：US20190090321A1
公开(公告)日：2019-03-21
申请号：US16130186
申请日：2018-09-13
发明人： Dae-sik LEE , Yanguk NAM , Songyi HAN
摘要： A backlight unit includes a power converter which generates a light source power voltage to a power node, a first light emitting diode string connected between the power node and a first node to receive the light source power voltage through the power node, a second light emitting diode string connected between the power node and a second node to receive the light source power voltage through the power node, and a current controller which controls a current flowing through the first node of the first light emitting diode string and a current flowing through the second node of the second light emitting diode string in response to a dimming voltage signal. The current controller includes a switching unit which electrically connects the first node of the first light emitting diode string to the second node of the second light emitting diode string in response to a mode enable signal.
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公开(公告)号：US20170309246A1
公开(公告)日：2017-10-26
申请号：US15495057
申请日：2017-04-24
发明人： Dae-sik LEE , Jongjae LEE , Sujin KIM , Yanguk NAM
CPC分类号： G09G3/3696 , G09G3/3666 , G09G3/3677 , G09G3/3688 , G09G2310/04 , G09G2310/061 , G09G2330/021 , G09G2330/023 , G09G2330/025 , H02M1/08 , H02M3/158 , H02M3/1584 , H02M2001/0009
摘要： A power supply device includes n power supply circuits connected in parallel and a controller to control a number of the operating power supply. The controller includes n detectors, a comparator, and an on/off controller. The n detectors are respectively connected to the n power supply circuits. The n detectors receive feedback current from the number of operating power supply circuits. The comparator compares the feedback current with predetermined first and second reference currents and outputs first, second, and third state signals. The on/off controller determines the number of the operating power supply circuits according to a cumulative number of each of the first to third state signals during a predetermined window section, and controls a on/off state of the power supply circuits according to the determined number.
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公开(公告)号：US20210158744A1
公开(公告)日：2021-05-27
申请号：US16997642
申请日：2020-08-19
发明人： Keunoh KANG , Yanguk NAM , Gwangsoo AHN
摘要： A display device includes a display panel, a gate driving circuit including a plurality of stages, and a power supply circuit outputting a clock signal, a clock-bar signal, a first discharge voltage, and a second discharge voltage. Each of stages includes a charge part that charges a clock signal having a first high voltage to a charge node, an output part that charges the first high voltage to an output node in response to a first node voltage of the charge node and outputs a second node voltage of the output node to a gate signal, a first discharge part that discharges the second node voltage to a first discharge voltage in response to the clock-bar signal having a second high voltage, and a second discharge part that discharges the first node voltage to a second discharge voltage in response to the clock-bar signal having the second high voltage.
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公开(公告)号：US20200279523A1
公开(公告)日：2020-09-03
申请号：US16876380
申请日：2020-05-18
发明人： Yanguk NAM , Jongjae LEE , Sujin KIM , Daesik LEE , Junki HONG , Heejeong SEO
摘要： A display device includes a display panel, pixels on the display panel, data and gate drivers, a timing controller which applies control signals respectively to the data and gate drivers, and a power management integrated circuit (“PMIC”) which applies a driving voltage to the data and gate drivers. The timing controller detects an operational condition of the display panel and selects one of stored power setting values to output the selected one of the power setting values to the PMIC. The PMIC includes, first and second storage banks, a controller which receives the power setting value from the timing controller, stores the power setting value in one of the first and second storage banks, and calls the stored power setting value to determine the driving voltage, and a power generator which applies the driving voltage based on the driving voltage determined by the controller.
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5.发明申请公开(公告)号：US20180308448A1
公开(公告)日：2018-10-25
申请号：US15904722
申请日：2018-02-26
发明人： Jongjae LEE , Dae-sik LEE , Yanguk NAM , Yoomi KIM , Songyi HAN
IPC分类号： G09G3/36 , H03K5/1252 , H03K5/24
CPC分类号： G09G3/3696 , G09G2330/04 , G09G2330/12 , H03K5/1252 , H03K5/24 , H03K21/08
摘要： A voltage generation circuit of a display device includes an over-current detection circuit that provides a driving voltage to a voltage terminal and outputs an over-current detection signal. The over-current detection circuit includes a current detector that outputs a detection signal at a first level when a voltage corresponding to an output current flowing through the voltage terminal during a blank period, in which a blank signal is activated, is lower than a first reference level or higher than a second reference level, a glitch remover that outputs a noise detection signal when a time period in which the detection signal is maintained at the first level is longer than a reference maintenance time, and a noise filter that activates the over-current detection signal when the noise detection signal is activated at least twice during a predetermined time period.
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公开(公告)号：US20190355307A1
公开(公告)日：2019-11-21
申请号：US16404518
申请日：2019-05-06
发明人： Yanguk NAM , Dae-Sik LEE
IPC分类号： G09G3/3258 , G09G3/3266 , G09G3/3291
摘要： A display device includes a display panel including a plurality of pixels, a data driver configured to provide a data signal to the pixels, a scan driver configured to provide a scan signal to the pixels, a power controller configured to provide a driving voltage to the data driver and the scan driver, and a timing controller configured to generate a data control signal that controls the data driver, a scan control signal that controls the scan driver, and a power control signal that controls the power controller based on an image data and a control signal. The power controller determines a transient time that changes the driving voltage from a first voltage level to a second voltage level based on the power control signal.
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7.发明申请公开(公告)号：US20190318705A1
公开(公告)日：2019-10-17
申请号：US16376922
申请日：2019-04-05
发明人： Dae-Sik LEE , Yanguk NAM , Songyi HAN
IPC分类号： G09G5/00
摘要： A power voltage generating circuit includes an input capacitor including a first end connected to an input node, and a second end connected to a ground, an inductor, an input switching element connected between the input node and a first end of the inductor, a control switching element including a control electrode connected to a switching controller configured to apply a switching control signal, an input electrode connected to a resistor, and an output electrode connected to a second end of the inductor, a diode including a first electrode connected to the second end of the inductor, and a second electrode connected to an output node, and an output capacitor connected between the output node and the ground, wherein the input switching element is configured to be turned off when a short circuit of a load connected to the output node is detected in a monitoring period.
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公开(公告)号：US20160365058A1
公开(公告)日：2016-12-15
申请号：US15173392
申请日：2016-06-03
发明人： Yanguk NAM , Youngil BAN , Sunkyu SON , Sunkoo KANG , Taegon KIM
IPC分类号： G09G3/36
CPC分类号： G09G3/3688 , G09G3/2096 , G09G3/3614 , G09G3/3696 , G09G2300/08 , G09G2320/0673 , G09G2330/021 , G09G2330/04 , G09G2330/12 , G09G2360/16 , G09G2370/047
摘要： There is provided a display device including a power management integrated circuit outputting a driving voltage and a gamma voltage, a timing controller outputting an image data signal and a driving control signal, a data driver converting the image data signal to a data voltage signal based on the driving voltage, the gamma voltage, and the driving control signal, a power connecting portion connecting the power management integrated circuit and the data driver, a voltage detector detecting the driving voltage and the gamma voltage that are voltage-dropped in the power connecting portion, and outputting a feedback signal, and a power adjustor receiving the feedback signal and outputting a power control signal to the power management integrated circuit, and adjusting the driving voltage and the gamma voltage based on the power control signal.
摘要翻译： 提供了一种显示装置，包括输出驱动电压和伽马电压的功率管理集成电路，输出图像数据信号的定时控制器和驱动控制信号，将图像数据信号转换为数据电压信号的数据驱动器，基于 驱动电压，伽马电压和驱动控制信号，连接功率管理集成电路和数据驱动器的电源连接部分，检测电力连接部分中电压下降的驱动电压和伽马电压的电压检测器 ，并输出反馈信号;以及功率调节器，接收反馈信号，并向功率管理集成电路输出功率控制信号，并根据功率控制信号调整驱动电压和伽马电压。
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公开(公告)号：US20200020297A1
公开(公告)日：2020-01-16
申请号：US16388231
申请日：2019-04-18
发明人： Yanguk NAM , Dae-Sik LEE , Taegon IM
IPC分类号： G09G5/00
摘要： A display apparatus includes a display panel, a data driver, a power voltage generator, a driving controller and a timing compensator. The display panel displays an image based on input image data. The data driver outputs a data voltage to the display panel. The power voltage generator outputs a data power voltage to the data driver. The driving controller controls a driving timing of the data driver. The timing compensator changes an output timing of the data voltage of the data driver when a feedback data power voltage is less than a reference data power voltage at a start point of an active period.
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公开(公告)号：US20190278114A1
公开(公告)日：2019-09-12
申请号：US16260936
申请日：2019-01-29
发明人： Dae-Sik LEE , Yanguk NAM , Sanghyun LEE
IPC分类号： G02F1/13 , G09G3/3266 , G09G3/00 , G09G3/36 , G02F1/1345
摘要： A short-circuit detection circuit includes a voltage comparison block that receives a scan start signal from a scan start signal transmission line, receives a reference voltage from a reference voltage source, and outputs a comparison result by comparing the scan start signal with the reference voltage at a falling edge of a vertical start signal, and a short-circuit determination block that determines whether the scan start signal transmission line is short-circuited based on the comparison result and operates an over-current protection circuit by providing a short-circuit detection signal to the over-current protection circuit when the scan start signal transmission line is short-circuited.
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