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11.发明授权公开(公告)号：US12008966B2
公开(公告)日：2024-06-11
申请号：US18099451
申请日：2023-01-20
Applicant: Samsung Display Co., Ltd.
Inventor： Dae-Sik Lee , Siduk Sung , Songyi Han
IPC: G09G3/3275
CPC classification number: G09G3/3275 , G09G2310/027 , G09G2330/021
Abstract: A display device includes a display panel which displays an image, and a control circuit board connected to the display panel. The control circuit board includes a controller which analyzes the image in real time and determines in real time a digital-type power voltage based on the image, and a voltage generator which generates an analog-type power voltage based on the digital-type power voltage received from the controller. The voltage generator includes a digital-analog converter which converts the digital-type power voltage into the analog-type power voltage and outputs the analog-type power voltage.
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公开(公告)号：US11030961B2
公开(公告)日：2021-06-08
申请号：US16221021
申请日：2018-12-14
Applicant: Samsung Display Co., Ltd.
Inventor： Jin-Taek Hong , Songyi Han
Abstract: A DC to DC converter includes: an input voltage source; an inductor connected to the input voltage source; a diode connected to the inductor; a capacitor connected to the diode; a plurality of switching elements connected to a node between the inductor and the diode in a parallel connection; and a controller configured to set duty ratios of currents flowing through the switching elements such that the duty ratios of the currents flowing through the switching elements are equal to each other.
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公开(公告)号：US10283058B2
公开(公告)日：2019-05-07
申请号：US15455749
申请日：2017-03-10
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Songyi Han , Gwangteak Lee , Won-Hyoung Kang
Abstract: Provided is a display device including a plurality of light sources configured to be driven by a driving voltage, turned on during an on section, and turned off during an off section, a display panel configured to display an image by using light outputted from the light sources, a voltage converter connected to the light sources and configured to generate the driving voltage, and a backlight control circuit including a light source driving circuit and a voltage drop circuit. The light source driving circuit includes a pulse generator including a control input terminal configured to receive a first voltage during the on section and receive a second voltage during the off section and output a control pulse signal to control a level of the driving voltage based on a voltage applied to the control input terminal. The voltage drop circuit applies the second voltage to the control input terminal during the off section. The second voltage is smaller than the first voltage.
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公开(公告)号：US09288883B2
公开(公告)日：2016-03-15
申请号：US13734400
申请日：2013-01-04
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Woojin Lee , Songyi Han , SeungYoung Choi
CPC classification number: H05B37/036 , G06F3/038 , H05B33/0815 , H05B33/0827
Abstract: A backlight unit includes a power converter which generates a light driving voltage in response to a voltage control signal with a first level, a plurality of light emitting strings, wherein each of the light emitting strings receives the light driving voltage through a first end thereof, and a controller which generates the voltage control signal. The controller is connected to a second end of at least one of the light emitting strings and detects a level of a signal at the connected second end to detect an operation state of the light emitting strings. The controller generates the voltage control signal with a second level to stop the power converter from generating the light driving voltage when the operation state of the light emitting strings is in an abnormal state.
Abstract translation: 背光单元包括响应于具有第一电平的电压控制信号而产生光驱动电压的功率转换器，多个发光串，其中每个发光串通过其第一端接收光驱动电压， 以及产生电压控制信号的控制器。 控制器连接到至少一个发光串的第二端，并检测连接的第二端的信号电平，以检测发光串的操作状态。 当发光串的操作状态处于异常状态时，控制器产生具有第二电平的电压控制信号，以停止功率转换器产生光驱动电压。
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Patent Agency Ranking
公开(公告)号：US10957277B2
公开(公告)日：2021-03-23
申请号：US16376922
申请日：2019-04-05
Applicant: Samsung Display Co., Ltd.
Inventor： Dae-Sik Lee , Yanguk Nam , Songyi Han
IPC: G09G5/00
Abstract: 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：US10770024B2
公开(公告)日：2020-09-08
申请号：US16233206
申请日：2018-12-27
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Gwangsoo Ahn , Sanghyun Lee , Dongwon Park , Songyi Han
Abstract: A display device includes a driving controller sensing a pattern of first image signals from a source external to the driving controller and outputting a compensation selection signal corresponding to the sensed pattern. A voltage generator generates a driving power voltage in response to the compensation selection signal. The voltage generator includes a power converter generating the driving power voltage in response to a power control signal, a comparator comparing the driving power voltage with a reference voltage to output a feedback signal to a first node, and a compensation circuit including a plurality of compensation units. A selected compensation unit is connected to the first node, and a power control circuit outputs the power control signal in response to the feedback signal. The slew rate of the feedback signal may be controlled by a compensation circuit to remove a ripple component from the driving power voltage.
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17.发明授权公开(公告)号：US10607562B2
公开(公告)日：2020-03-31
申请号：US15904722
申请日：2018-02-26
Applicant: Samsung Display Co., Ltd.
Inventor： Jongjae Lee , Dae-sik Lee , Yanguk Nam , Yoomi Kim , Songyi Han
IPC: G09G3/36 , H03K5/1252 , H03K5/24 , G09G3/20 , H03K21/08
Abstract: 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：US09763292B2
公开(公告)日：2017-09-12
申请号：US14841464
申请日：2015-08-31
Applicant: Samsung Display Co., Ltd.
Inventor： Wonhyoung Kang , Mingyu Kim , Taegon Im , Songyi Han , Jintaek Hong
CPC classification number: H05B33/0815 , G09G3/3406 , G09G3/3426 , H05B33/0845 , H05B33/0851 , H05B33/089 , H05B37/0245 , H05B37/0263 , H05B37/029 , H05B37/032
Abstract: A backlight unit includes: a light source configured to emit light based on a driving current; and a backlight controller receiving a digital dimming signal that defines a length of an output period of the driving current from a pulse width modulator and configured to, when a duty ratio of the driving current is less than a reference duty ratio, modulates the duty ratio of the driving current so that the duty ratio of the driving current is equal to or greater than the reference duty ratio and decrease a duty ratio of the digital dimming signal.
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公开(公告)号：US20140055439A1
公开(公告)日：2014-02-27
申请号：US13734400
申请日：2013-01-04
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Woojin Lee , Songyi Han , SeungYoung Choi
CPC classification number: H05B37/036 , G06F3/038 , H05B33/0815 , H05B33/0827
Abstract: A backlight unit includes a power converter which generates a light driving voltage in response to a voltage control signal with a first level, a plurality of light emitting strings, wherein each of the light emitting strings receives the light driving voltage through a first end thereof, and a controller which generates the voltage control signal. The controller is connected to a second end of at least one of the light emitting strings and detects a level of a signal at the connected second end to detect an operation state of the light emitting strings. The controller generates the voltage control signal with a second level to stop the power converter from generating the light driving voltage when the operation state of the light emitting strings is in an abnormal state.
Abstract translation: 背光单元包括响应于具有第一电平的电压控制信号而产生光驱动电压的功率转换器，多个发光串，其中每个发光串通过其第一端接收光驱动电压， 以及产生电压控制信号的控制器。 控制器连接到至少一个发光串的第二端，并检测连接的第二端的信号电平，以检测发光串的操作状态。 当发光串的操作状态处于异常状态时，控制器产生具有第二电平的电压控制信号，以停止功率转换器产生光驱动电压。
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