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公开(公告)号：KR1020130015720A
公开(公告)日：2013-02-14
申请号：KR1020110077881
申请日：2011-08-04
Applicant: 삼성전자주식회사
IPC: H05B37/02 , G02F1/13357
CPC classification number: H05B33/0818 , G09G3/36 , H05B33/0815
Abstract: PURPOSE: A backlight unit, control device and control method thereof are provided to reduce variation of the average output current due to the change of component characteristic and IO condition by outputting a control signal for a transistor. CONSTITUTION: An LED drive unit(220) drives an LED(210) according to switching operation of a transistor. A control unit(230) add an additional signal to current output from the LED and compares with reference current. The control unit controls switching operation of the transistor according to the compared result.
Abstract translation: 目的：提供一种背光单元，控制装置及其控制方法，以通过输出晶体管的控制信号来减少由于元件特性和IO状态的变化引起的平均输出电流的变化。 构成：LED驱动单元（220）根据晶体管的切换操作驱动LED（210）。 控制单元（230）向LED的电流输出添加附加信号，并与参考电流进行比较。 控制单元根据比较结果控制晶体管的开关动作。
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42.发明公开
公开(公告)号：KR1020130015213A
公开(公告)日：2013-02-13
申请号：KR1020110077088
申请日：2011-08-02
Applicant: 삼성전자주식회사
IPC: H05B37/02
CPC classification number: H05B33/0818 , H05B33/0848 , Y02B20/347 , Y02B20/42
Abstract: PURPOSE: A control device for controlling an LED driving circuit, an LED driving device including the same, and driving methods thereof are provided to improve the quality of an image by supplying a stable current to an LED after a dimming off section is increased. CONSTITUTION: A current control unit(202) outputs a control signal for controlling a duty ratio of a PWM signal of an LED driving circuit when a dimming on signal is inputted. A voltage control unit(201) outputs a control signal to control a duty ratio of a PWM signal of the LED driving circuit when a dimming off signal is inputted. A switching unit(203) transmits the control signal from the current control unit to the LED driving circuit when the dimming on signal is inputted. The switching unit transmits the control signal from the voltage control unit to the LED driving circuit when the dimming off signal is inputted. [Reference numerals] (201) Voltage control unit; (202) Current control unit; (203) Switching unit
Abstract translation: 目的：提供一种用于控制LED驱动电路的控制装置，包括该LED驱动电路的LED驱动装置及其驱动方法，以便在减光部分增加之后通过向LED提供稳定的电流来提高图像的质量。 构成：当输入调光开启信号时，电流控制单元（202）输出用于控制LED驱动电路的PWM信号的占空比的控制信号。 当输入调光关闭信号时，电压控制单元（201）输出控制信号以控制LED驱动电路的PWM信号的占空比。 当输入调光开启信号时，切换单元（203）将来自当前控制单元的控制信号发送到LED驱动电路。 当输入调光关闭信号时，开关单元将控制信号从电压控制单元发送到LED驱动电路。 （附图标记）（201）电压控制单元; （202）电流控制单元; （203）开关单元
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公开(公告)号：KR1020120045809A
公开(公告)日：2012-05-09
申请号：KR1020100107623
申请日：2010-11-01
Applicant: 삼성전자주식회사
IPC: G02F1/133 , G02F1/13357 , H05B37/02 , G09G3/36
CPC classification number: G09G3/3426 , G09G2360/16 , G02F1/133 , G09G3/36 , H05B33/0815 , H05B33/0824 , H05B33/0857
Abstract: PURPOSE: A display device and a method for increasing picture quality of the same are provided to increase picture quality of a display screen by preventing light leakage. CONSTITUTION: A light guide plate(110) is in parallel with and behind a liquid crystal panel. At least one LED(Light Emitting Diode) module(120) is arranged on one side of the light guide plate. A driving unit(130) drives a plurality of LED(Light Emitting Diode)s. An image analysis unit(140) analyzes an input image. A switching unit(150) turns at least one LED off wherein the LED is adjacent to an edge area of the liquid crystal panel based on the analyzed image.
Abstract translation: 目的：提供一种用于提高图像质量的显示装置和方法，以通过防止漏光来提高显示屏的图像质量。 构成：导光板（110）与液晶面板平行并在其后面。 至少一个LED（发光二极管）模块（120）布置在导光板的一侧。 驱动单元（130）驱动多个LED（发光二极管）。 图像分析单元（140）分析输入图像。 开关单元（150）基于所分析的图像转动至少一个LED，其中LED与液晶面板的边缘区域相邻。
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公开(公告)号：KR1020110042539A
公开(公告)日：2011-04-27
申请号：KR1020090099254
申请日：2009-10-19
Applicant: 삼성전자주식회사
CPC classification number: H05B33/0848 , G09G3/3406 , G09G2300/0426
Abstract: PURPOSE: A backlight unit(BLU) for stably driving various light source modules and a display apparatus including the same are provided to constantly maintain the ratio of the input voltage and the output voltage in a light source driving unit by controlling the output voltage of a converter supplying power to the light source driving voltage. CONSTITUTION: A light source module(157) generates backlight using a plurality of light sources. A converter(153) outputs an output voltage by transforming an input voltage. A light source driving unit(155) drives the light source module using the output voltage of the converter. A controlling unit(159) controls the output voltage of the converter based on the output voltage of the light source driving unit.
Abstract translation: 目的：提供用于稳定驱动各种光源模块的背光单元（BLU）和包括该背光单元的显示装置，以通过控制光源驱动单元的输出电压来恒定地维持光源驱动单元中的输入电压和输出电压的比例 转换器为光源驱动电压供电。 构成：光源模块（157）使用多个光源产生背光。 A转换器（153）通过变换输入电压来输出输出电压。 光源驱动单元（155）使用转换器的输出电压来驱动光源模块。 控制单元（159）基于光源驱动单元的输出电压来控制转换器的输出电压。
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公开(公告)号：KR1020100113787A
公开(公告)日：2010-10-22
申请号：KR1020090032280
申请日：2009-04-14
Applicant: 삼성전자주식회사
IPC: G02F1/13357 , H01R33/08 , F21V19/00
CPC classification number: G02F1/133603 , G02F1/133615 , G02F2001/133612 , G02F1/1336
Abstract: PURPOSE: An optical source module, BLU and a display device in order for a user to view broadcasting contents are provided to variously and easily perform the design change of BLU. CONSTITUTION: A display device displays an image. A BLU(Back Light Unit) offers back light to the display device. A first optical source module prepares a plurality of light sources. The BLU equips an LED printed circuit board(151), LED driving parts(153-1, 153-2, 153-3), driving terminals(155-1, 155-2, 155-3) and connecting cables.
Abstract translation: 目的：提供一种光源模块，BLU和显示设备，以便用户观看广播内容，以便各种并且容易地执行BLU的设计更改。 构成：显示设备显示图像。 BLU（背光单元）向显示设备提供背光。 第一光源模块准备多个光源。 BLU配备LED印刷电路板（151），LED驱动部件（153-1,153-2,153-3），驱动端子（155-1,155-2,155-3）和连接电缆。
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Patent Agency Ranking
公开(公告)号：KR100917623B1
公开(公告)日：2009-09-17
申请号：KR1020060013740
申请日：2006-02-13
Applicant: 삼성전자주식회사
CPC classification number: H05B33/0887 , H05B33/0815 , Y02B20/347
Abstract: 본 발명에 따른 LED 구동장치는 LED(Light Emitting Diode)와; PWM 신호에 대응하여 LED에 흐르는 전류의 크기를 조정하는 전류조정부와; LED에 걸리는 전압을 검출하는 전압검출부와; 전압검출부로부터 검출된 검출전압과 소정의 기준전압을 비교하여, 검출전압이 상기 기준전압보다 작은 경우, PWM 신호가 상기 전류조정부에 인가되는 것을 차단하는 PWM 차단부를 포함한다. 이에 의해, LED가 소정 개수 이상 단락된 경우, PWM 신호를 차단하여 LED에 전류가 흐르지 않도록 함으로써 회로를 보호할 수 있다.
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公开(公告)号：KR1020070073713A
公开(公告)日：2007-07-10
申请号：KR1020070062461
申请日：2007-06-25
Applicant: 삼성전자주식회사
IPC: G02F1/133 , G02F1/13357
CPC classification number: G09G3/342 , G02F1/133603 , G09G3/3426 , G09G2310/024
Abstract: A backlight unit and a display device including the same are provided to drive a light source member divisionally by a simple structure. A light source member(440) is divided into plural division areas. The division areas are individually driven. A light source driving member group(430) supplies the power to the light source member and includes a multiple driving member connected with at least two division areas. A light source control member controls the light source driving member group so that the power is selectively supplied to the division areas connected with the multiple driving member. Each division area is connected with any one among plural multiple driving members. The light source member includes a light emitting diode. The plural division areas are arranged with a band shape in parallel.
Abstract translation: 提供背光单元和包括该背光单元的显示装置以通过简单的结构分开地驱动光源构件。 光源部件（440）被分成多个划分区域。 分区是单独驱动的。 光源驱动构件组（430）向光源构件提供电力，并且包括与至少两个分割区域连接的多个驱动构件。 光源控制构件控制光源驱动构件组，使得选择性地将电力供给到与多个驱动构件连接的分割区域。 每个划分区域与多个多个驱动构件中的任一个连接。 光源部件包括发光二极管。 多个分割区域平行排列成带状。
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公开(公告)号：KR1020070030033A
公开(公告)日：2007-03-15
申请号：KR1020050084777
申请日：2005-09-12
Applicant: 삼성전자주식회사
CPC classification number: H05B33/0818 , G09G3/3406 , G09G2320/064 , G09G2330/021 , Y02B20/346
Abstract: A display device is provided to improve image quality by preventing a continuous rise of a standby voltage, when an optical source is turned off. A display device includes a voltage source(10), a main voltage path(2a), a standby voltage path(2b), a switching unit(30), a standby voltage adjusting unit(40), and a controller(50). The voltage source supplies a predetermined driving voltage to an optical source. The main voltage path supplies the driving voltage to the optical source. The standby voltage path is branched from the main voltage path and returns to the voltage source. The switching unit supplies the driving voltage to one of the main and standby voltage paths. The standby voltage adjusting unit adjusts the voltage, which is applied on the standby voltage path. The controller controls the standby voltage adjusting unit, so that the standby voltage is maintained at a predetermined range, when no voltage is applied to the main voltage path.
Abstract translation: 提供一种显示装置，用于当光源关闭时，通过防止待机电压的持续上升来提高图像质量。 显示装置包括电压源（10），主电压路径（2a），备用电压路径（2b），开关单元（30），待机电压调整单元（40）和控制器（50）。 电压源向光源提供预定的驱动电压。 主电压路径向光源提供驱动电压。 备用电压路径从主电压路径分支并返回到电压源。 开关单元将驱动电压提供给主电压路径和待机电压路径之一。 备用电压调整单元调整施加在待机电压路径上的电压。 控制器控制待机电压调整单元，使得当没有电压施加到主电压路径时，待机电压保持在预定范围。
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公开(公告)号：KR100691326B1
公开(公告)日：2007-03-12
申请号：KR1020050086660
申请日：2005-09-16
Applicant: 삼성전자주식회사
Abstract: A display device is provided to supply a stable source voltage to a light source by monitoring the operation state of the light source and comparing the source voltage with reference voltages. A display device includes a display unit, plural light sources, a variable voltage supply unit(110), a switching unit(130), and a controller(160). An image is displayed on the display unit. The variable voltage supply unit supplies a voltage to the light source. The switching unit is series-connected to the light source and controls the current, which flows through the light source. The controller compares plural reference voltages, which are generated according to the operation state of the light source, with a voltage across both ends of the switching element, and controls the variable voltage supply unit, so that the voltage across both ends of the switching element is maintained at a constant value.
Abstract translation: 通过监视光源的操作状态并将源电压与参考电压进行比较，提供显示装置以向光源提供稳定的源电压。 显示装置包括显示单元，多个光源，可变电压供应单元（110），切换单元（130）和控制器（160）。 图像显示在人机界面上。 可变电压供应单元向光源提供电压。 开关单元串联连接到光源并控制流过光源的电流。 控制器将根据光源的操作状态生成的多个参考电压与开关元件两端的电压进行比较，并控制可变电压提供单元，使得开关元件两端的电压 保持在一个恒定值。
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