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公开(公告)号：KR101300379B1
公开(公告)日：2013-08-29
申请号：KR1020100128478
申请日：2010-12-15
Applicant: 삼성전기주식회사
Abstract: 본 발명은 전원 공급 동작시의 이상 동작, 고장 등에 의한 과전류 또는 단락 전류와 같은 이상 전류를 검출하여 동작을 차단할 수 있는 보호 기능을 갖는 전원 공급 장치에 관한 것으로, 입력 전원을 스위칭하여 사전에 설정된 구동 전원으로 변환하고, 입력되는 레벨 변동 신호에 따라 스위칭 동작의 중단 및 유지를 제어하는 전원 변환부와, 동작 초기에 상기 전원 변환부의 스위칭 동작시 발생된 전류를 충전한 후, 충전 후의 상기 전원 변환부의 스위칭 동작시 발생된 전류의 레벨 변동을 상기 전원 변환부에 전달하는 보호부를 포함하는 것을 특징으로 하는 보호 기능을 갖는 전원 공급 장치를 제공한다.
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公开(公告)号：KR1020120070949A
公开(公告)日：2012-07-02
申请号：KR1020100132496
申请日：2010-12-22
Applicant: 삼성전기주식회사
CPC classification number: H02M3/338 , H02M2001/0022 , Y02B70/1433
Abstract: PURPOSE: A control circuit of an LLC(Logical Link Control) resonant converter and an LLC resonant converter using the same are provided to obtain a desired input-output DC voltage gain according to an AC input voltage which is changeable without an active power factor correction circuit. CONSTITUTION: A minimum switching frequency changing circuit changes a minimum switching frequency according to an AC input voltage of an LLC resonant converter. A first pulse signal generation portion and a second pulse signal generation portion generate a first pulse signal and a second pulse signal based on a switching frequency limited by the minimum switching frequency changing circuit. The minimum switching frequency changing circuit includes a transistor for controlling the minimum switching frequency which operates according to the AC input voltage of the LLC resonant converter. A control circuit of the LLC resonant converter changes the time constant of the minimum switching frequency changing circuit along with a switching capacitor and switching resistance according to the operation of the transistor for controlling the minimum switching frequency.
Abstract translation: 目的：提供LLC（逻辑链路控制）谐振变换器和使用其的LLC谐振变换器的控制电路，以根据AC输入电压获得期望的输入 - 输出DC电压增益，AC输入电压在没有有功功率因数校正的情况下是可变的 电路。 构成：最小开关频率变化电路根据LLC谐振变换器的交流输入电压改变最小开关频率。 第一脉冲信号产生部分和第二脉冲信号产生部分基于由最小开关频率改变电路限制的开关频率产生第一脉冲信号和第二脉冲信号。 最小开关频率改变电路包括用于控制根据LLC谐振转换器的AC输入电压工作的最小开关频率的晶体管。 LLC谐振转换器的控制电路根据用于控制最小开关频率的晶体管的操作，改变最小开关频率变化电路的时间常数以及开关电容器和开关电阻。
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公开(公告)号：KR101264024B1
公开(公告)日：2013-05-13
申请号：KR1020100132496
申请日：2010-12-22
Applicant: 삼성전기주식회사
CPC classification number: H02M3/338 , H02M2001/0022 , Y02B70/1433
Abstract: 본발명은 LLC 공진형컨버터의 AC 입력전압에대응하여최소스위칭주파수를가변하는최소스위칭주파수가변회로; 및상기최소스위칭주파수가변회로에의해제한된스위칭주파수에기초하여, 제 1 펄스신호및 제 2 펄스신호를발생하는제 1 펄스신호발생부및 제 2 펄스신호발생부;를포함하는 LLC 공진형컨버터의제어회로를제공한다.
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Patent Agency Ranking
公开(公告)号：KR1020130098973A
公开(公告)日：2013-09-05
申请号：KR1020130099473
申请日：2013-08-22
Applicant: 삼성전기주식회사
Abstract: PURPOSE: A DC/DC converter and a driving apparatus including the same are provided to increase the power conversion efficiency by including an AC/DC conversion group and a DC/DC conversion group without employing a separate DC/DC conversion group. CONSTITUTION: A DC/DC converter comprises a DC/DC converter part (120) and a control unit (124). The DC/DC converter part comprises switching units (121,221), transformers (122,222) and a rectifier (123). The DC/DC converter part switches the input power source, and converts into a pre-set DC power source to supply to a light emitting device. The control unit controls the switching of the DC/DC convert part according to the drive power supplied by the DC/DC converter part and a driving signal applied to the light emitting device to change the voltage level of the DC power supply. The control unit controls the switching on duty of the DC/DC converter part according to the on-time duty of the driving signal. [Reference numerals] (110) Power factor revision unit; (124b) Switching control unit; (AA) Organic light emitting diode module
Abstract translation: 目的：提供DC / DC转换器和包括该DC / DC转换器的驱动装置，以通过包括AC / DC转换组和DC / DC转换组而不使用单独的DC / DC转换组来提高功率转换效率。 构成：DC / DC转换器包括DC / DC转换器部件（120）和控制单元（124）。 DC / DC转换器部分包括开关单元（121,221），变压器（122,222）和整流器（123）。 DC / DC转换器部分切换输入电源，并转换成预设的DC电源以供应给发光器件。 控制单元根据由DC / DC转换器部件提供的驱动功率和施加到发光器件的驱动信号来控制DC / DC转换部件的切换，以改变DC电源的电压电平。 控制单元根据驱动信号的导通时间占空比控制DC / DC转换器部分的开关占空比。 （附图标记）（110）功率因数修正单元; （124b）开关控制单元; （AA）有机发光二极管模块
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公开(公告)号：KR1020120067063A
公开(公告)日：2012-06-25
申请号：KR1020100128478
申请日：2010-12-15
Applicant: 삼성전기주식회사
Abstract: PURPOSE: A power supply device is provided to rapidly block the operation of a switching device when the abnormal flow of a current is generated by determining whether the flow of the current is abnormal or not according to the change of charged voltage level. CONSTITUTION: A power source converting unit(110) switches an input power source and changes it into a fixed driving power source. The power source converting unit controls the stop and maintenance of a switching operation according to an inputted level change signal. A protection unit(120) charges a current created when the power source converting unit executes the switching operation in the initial stage. The protection unit transfers the level change signal to the power source converting unit.
Abstract translation: 目的：提供电源装置，通过根据充电电压电平的变化确定电流的流量是否异常，当电流的异常流量产生时，快速地阻断开关装置的动作。 构成：电源转换单元（110）切换输入电源并将其改变为固定的驱动电源。 电源转换单元根据输入的电平变化信号控制开关动作的停止和维持。 当电源转换单元在初始阶段执行切换操作时，保护单元（120）对产生的电流进行充电。 保护单元将电平变化信号传送到电源转换单元。
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公开(公告)号：KR1020150122447A
公开(公告)日：2015-11-02
申请号：KR1020140048703
申请日：2014-04-23
Applicant: 삼성전기주식회사
Abstract: 본발명은 LED 구동회로에관한것이다. 본발명에따른 LED 구동회로는, 입력된 DC 전압을다른크기의 DC 전압으로변환하는 DC/DC 변환부; DC/DC 변환부에의해변환된 DC 전압을공급받아구동하는 LED 어레이부; DC/DC 변환부에의해변환된 DC 전압을공급받아 LED 어레이부로제공하고, LED 어레이부에미리설정된일정한값의전류가흐르도록 LED 어레이부에흐르는전류를제어하는 LED 정전류회로부; 및 DC/DC 변환부의출력단에설치되며, 회로에비정상적인전류가흐를때, LED 어레이부측으로전류가흐를수 있는조건을제거하여비정상전류가 LED 어레이부측으로흐르지못하게함으로써 LED 어레이부를보호하는보호회로부를포함한다. 이와같은본 발명에의하면, LED TV의스탠바이상태에서 LED 바가단락되었을경우, LED 어레이측으로전류가흐를수 있는조건을원천적으로제거함으로써, 비정상상태에서의과전류감지수단으로서의대용량의다이오드와저항을필요로하지않게되며, 이에따라회로의부피및 제품의생산원가를감축할수 있다.
Abstract translation: 发光二极管（LED）驱动电路技术领域本发明涉及一种发光二极管（LED）驱动电路，包括：DC / DC转换单元，用于将输入的直流电压转换成不同的直流电压; LED阵列单元，用于接收由DC / DC转换单元转换的DC电压以驱动该DC电压; LED恒流电路单元，用于接收由DC / DC转换单元转换的DC电压，以提供给LED阵列单元，并且控制在LED阵列单元中流动的电流，以允许具有预定常数值的电流流入 LED阵列单元; 以及保护电路单元，其安装在DC / DC转换单元的输出端，并且当异常电流在电路中流动时，去除电流流向LED阵列单元的状态，以允许异常电流不向LED流动 阵列单元，以保护LED阵列单元。 根据本发明，当LED条在LED电视的待机状态下短路时，电流可以朝向LED阵列流动的条件基本上被去除，因此作为过电流检测装置的大容量二极管 不需要异常状态和电阻，从而减少电路的体积和产品的生产成本。
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公开(公告)号：KR1020130076293A
公开(公告)日：2013-07-08
申请号：KR1020110144821
申请日：2011-12-28
Applicant: 삼성전기주식회사
IPC: H02M3/28
CPC classification number: H02M3/33592 , H05B33/0896 , Y02B70/1475
Abstract: PURPOSE: A direct current (DC) / DC converter and a driving device having the same are provided to increase power conversion efficiency by being made of an AC / DC convert stage and a DC / DC convert stage. CONSTITUTION: A DC / DC convertor part (120) converts an input power source into a predetermined DC power source. The DC / DC convertor part supplies the DC power source to a light emitting device. The DC / DC convertor part comprises a switching part, a transformer, and a rectifier. A controller (124) controls the switching of the DC / DC convertor part according to a driving signal which is applied to the light emitting device. [Reference numerals] (110) Power-factor correction unit; (124b) Switching control unit; (AA) Organic LED module
Abstract translation: 目的：提供直流（DC）/ DC转换器及其驱动装置，以通过由AC / DC转换级和DC / DC转换级构成来提高功率转换效率。 构成：DC / DC转换器部件（120）将输入电源转换成预定的DC电源。 DC / DC转换器部件将DC电源提供给发光器件。 DC / DC转换器部分包括开关部分，变压器和整流器。 控制器（124）根据施加到发光器件的驱动信号来控制DC / DC转换器部分的切换。 （附图标记）（110）功率因数校正单元; （124b）开关控制单元; （AA）有机LED模块
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公开(公告)号：KR101053408B1
公开(公告)日：2011-08-01
申请号：KR1020100016131
申请日：2010-02-23
Applicant: 삼성전기주식회사
CPC classification number: H05B33/0827 , G09G3/3406 , G09G2360/145
Abstract: PURPOSE: A backlight operation apparatus is provided to supply operation power to a multichannel light emitting diode lamp with one transformer, thereby enabling to control a constant current flowing in each light emitting diode lamp. CONSTITUTION: An inverter part(130) switches input power source and supplies power with a constant period. A lamp part includes a plurality of lamps which is emitting light by receiving switched power from the inverter part. A current balance part is electrically connected between the inverter part and a lamp part(160) and transmits switched power from the inverter part to a plurality of lamps in the lamp part. A half power period of the switched power is transmitted to a lamp with odd number in the lamp part and the other half power period is transmitted to a lamp with even number. The current balance is maintained by a charge equilibrium principle between the each half power period of the switched power.
Abstract translation: 目的：提供一种背光操作装置，用于向具有一个变压器的多通道发光二极管灯提供工作电力，从而能够控制在每个发光二极管灯中流动的恒定电流。 构成：逆变器部件（130）切换输入电源并以恒定周期供电。 灯部包括通过从逆变器部接收开关电力而发光的多个灯。 电流平衡部分电连接在逆变器部分和灯部分（160）之间，并将切换的电力从逆变器部分发射到灯部分中的多个灯。 开关电源的半功率周期被发送到灯部分中具有奇数的灯，而另一半功率周期被发送到具有偶数的灯。 当前平衡由开关电源的每个半功率周期之间的电荷平衡原理来维持。
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