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    • 4. 发明授权
    • 백 라이트 유닛 및 이를 이용한 액정 표시장치
    • 背光单元和使用其的液晶显示器
    • KR101747713B1
    • 2017-06-16
    • KR1020090134418
    • 2009-12-30
    • 엘지디스플레이 주식회사
    • 한재원
    • G09G3/36G02F1/133
    • 본발명은 LED(Light Emitting Diode) 백라이트의구동제어회로를안정화시킴으로써발열및 ESD(Electrostatic Discharge)로부터그 신뢰성을향상시킬수 있도록한 백라이트유닛및 이를이용한액정표시장치에관한것으로, 광을발생하는복수의 LED와상기복수의 LED로부터입사되는광의효율을향상시키는광학부를구비한백 라이트; 및상기백 라이트에구동전원을제공함과아울러외부또는타이밍컨트롤러로부터의디밍제어신호에따라상기백 라이트의 LED 구동전류량을조절하여상기백 라이트의발광량을제어하는백 라이트제어부를구비하며, 상기백 라이트제어부는상기백 라이트로부터복수의 LED 구동전류들을입력받아상기복수의 LED 구동전류들간의전류량차이를최소화시킨후 상기각 LED 구동전류의전류량을조절함으로써상기백 라이트의발광량을제어하는것을특징으로한다.
    • 本发明涉及一种液晶显示器背光单元,以及使用相同的,所以可以通过稳定LED的驱动控制电路(发光二极管)背光,多个产生光的提高从热和ESD(静电放电)的可靠性 具有LED和用于提高从所述多个LED入射的光的效率的光学部件的背光; 并且它包括调整背光控制的LED驱动电流的背光源控制部,根据所述光的背光源的发光量到袋提供了一种驱动功率的光,以及robuteoui外部或定时控制器调光控制信号,背光控制单元,所述 它的特征在于,用于接收多个来自背光源的LED驱动电流的通过控制电流中的每个LED的驱动电流的流动的量最小化,所述多个LED的驱动电流之间的电流差的量之后控制由背光源发出的光的量。
    • 8. 发明公开
    • 엘이디 구동회로
    • 发光二极管驱动电路
    • KR1020130018065A
    • 2013-02-20
    • KR1020110080904
    • 2011-08-12
    • 엘지디스플레이 주식회사
    • 한재원장훈
    • H05B37/02
    • Y02B20/42H05B33/0815H05B33/0827H05B33/083Y02B20/347
    • PURPOSE: An LED driving circuit is provided to improve the efficiency of the driving circuit by controlling constant current supply to multiple LED arrays using one control part. CONSTITUTION: A clock generating part(204) outputs a clock signal. A display part(208) emits light by multiple LED arrays. A switching circuit comprises multiple switching elements. A control part(250) controls the switching elements of the switching circuit. A power control part controls the amount of the current in the LED arrays after receiving the LED arrays current feedback from the LED arrays. [Reference numerals] (202) Power supply part; (204) Clock generating part; (AA) First LED array; (BB) Second LED array; (CC) Third LED array; (DD) N-th LED array
    • 目的:提供LED驱动电路,通过使用一个控制部分控制对多个LED阵列的恒定电流供应来提高驱动电路的效率。 构成:时钟发生部(204)输出时钟信号。 显示部分(208)由多个LED阵列发光。 开关电路包括多个开关元件。 控制部分(250)控制开关电路的开关元件。 功率控制部分在从LED阵列接收LED阵列电流反馈之后控制LED阵列中的电流量。 (附图标记)(202)电源部; (204)时钟发生部; (AA)第一LED阵列; (BB)第二LED阵列; (CC)第三LED阵列; (DD)第N个LED阵列
    • 9. 发明公开
    • 액정표시장치 및 그 구동방법
    • LCD及其驱动方法
    • KR1020120133471A
    • 2012-12-11
    • KR1020110052117
    • 2011-05-31
    • 엘지디스플레이 주식회사
    • 한재원
    • G09G3/36H05B37/02
    • H05B33/0818G09G3/3406G09G2360/145H05B33/0884
    • PURPOSE: A liquid crystal display device and a driving method thereof are provided to determine the malfunction of LED and FET by using a common pin. CONSTITUTION: A backlight(400) includes a plurality of LED arrays(410). The plurality of LED arrays is composed of a plurality of LEDs(411). The plurality of LEDs provides light to a liquid crystal panel. A lamp driver(500) applies an output voltage to the backlight. The lamp driver includes a plurality of FETs, a sensing voltage unit and a PWM controller(520). The sensing voltage unit senses a sensing voltage of the drain electrode of the plurality of FETs. The PWM controller outputs a PWM control signal to the gate electrode of the plurality of FETs and the sensing voltage unit. [Reference numerals] (510) DC-DC converter; (520) PWM controller; (551) Feedback voltage controller; (552) Alarm signal controller; (AA) Vin; (BB) Vout; (CC) FB, AS; (DD,EE) PS; (FF) MVF, LDS, FDS; (GG) PTV; (HH) TR
    • 目的:提供一种液晶显示装置及其驱动方法,以通过使用公共引脚来确定LED和FET的故障。 构成:背光(400)包括多个LED阵列(410)。 多个LED阵列由多个LED(411)组成。 多个LED向液晶面板提供光。 灯驱动器(500)向背光源施加输出电压。 灯驱动器包括多个FET,感测电压单元和PWM控制器(520)。 感测电压单元感测多个FET的漏电极的感测电压。 PWM控制器向多个FET的栅电极和感测电压单元输出PWM控制信号。 (附图标记)(510)DC-DC转换器; (520)PWM控制器; (551)反馈电压控制器; (552)报警信号控制器; (AA)Vin; (BB)Vout; (CC)FB,AS; (DD,EE)PS; (FF)MVF,LDS,FDS; (GG)PTV; (HH)TR
    • 10. 发明公开
    • 액정표시장치
    • 液晶显示装置
    • KR1020120003336A
    • 2012-01-10
    • KR1020100064122
    • 2010-07-02
    • 엘지디스플레이 주식회사
    • 한재원
    • G02F1/133G02F1/1345
    • G09G3/3406G02B6/0073G02B6/0083G02F1/133615G09G3/3696
    • PURPOSE: A liquid crystal display device is provided to reduce a manufacturing cost and to minimize the area of a main printed circuit board by installing a plurality of external devices on a flexible printed circuit board through a TCP or COF package method. CONSTITUTION: A plurality of light sources offers light to an LCD panel. A plurality of light sources is separately installed on a first printed circuit board. A flexible printed circuit board(180) is electrically connected with the first and the second printed circuit boards. A current control IC(185) controls current of light sources on the flexible printed circuit board.
    • 目的:提供一种液晶显示装置,以通过TCP或COF封装方法在柔性印刷电路板上安装多个外部装置来降低制造成本并使主印刷电路板的面积最小化。 构成:多个光源向LCD面板提供光源。 多个光源分别安装在第一印刷电路板上。 柔性印刷电路板(180)与第一和第二印刷电路板电连接。 电流控制IC(185)控制柔性印刷电路板上的光源的电流。