Abstract:
발광다이오드구동회로가개시된다. 본발광다이오드구동회로는, LED 어레이, 스위치소자의스위칭동작에의하여 LED 어레이에정전류를제공하는 LED 구동회로부, 기설정된주파수의클럭신호를이용하여디밍신호에대응되는정전류가 LED 어레이에제공되도록스위치소자를제어하는구동제어부를포함하며, 구동제어부는, 디밍신호의신호값이천이하면클럭신호의주파수를가변한다.
Abstract:
본 발명은 인쇄회로기판 상에서 기립하도록 인덕터 코어의 형상이 개량된 인덕터 및 이를 포함하는 디스플레이장치에 관한 것이다. 본 발명에 의한 인덕터에 있어서, 코일과, 상기 코일이 권선되는 원통형의 몸체와 상기 몸체의 양측 끝단이 확장 형성된 플랜지부를 포함하는 드럼 코어와, 일측이 상기 플랜지부에 고정되고 타측이 상기 인쇄회로기판에 고정되며 상기 코일의 양측 끝단이 감겨서 고정되는 복수의 핀과, 상기 플랜지부의 일영역으로부터 돌출 형성되어 상기 인덕터가 상기 인쇄회로기판 상에서 기립하도록 지지하는 돌기부를 포함한다. 이러한 본 발명에 따르면, 인쇄회로기판에 인덕터를 수평을 유지하면서 실장할 수 있어 인덕터의 실장 품질을 향상시키는 효과를 얻을 수 있다.
Abstract:
PURPOSE: An LED driving apparatus, an LED driving method and a display device applying the same are provided to prevent the damage of an LED module by preventing a high external voltage from being applied to the LED module, by stopping the operation of the LED driving part by blocking an external power supply applied to the LED driving part when the LED module and an exterior part are short-circuited. CONSTITUTION: A display panel displays an image. LED modules(223,310) provide a backlight for the display panel. An LED driving part(321) applies a driving voltage to the LED module using an external power supply. An exterior part(322) supports the LED driving part and the LED module, and comprises a grounding terminal prepared independently of the external power supply. An LED driving control part(323) stops the operation of the LED driving part, on the basis of a current inputted from the grounding terminal. [Reference numerals] (310) LED module; (321) LED driving part; (322) Exterior part; (323) LED driving control part
Abstract:
PURPOSE: A light emitting driving apparatus and method, and a display device are provided to drive a plurality of LED array blocks having a common anode by using an LED driving circuit of a switching method. CONSTITUTION: A light emitting driving apparatus independently drives a plurality of LED arrays by using a plurality of driving circuit parts(600-1,600-2,600-3). The light emitting driving apparatus is formed by interlinking the plurality of driving circuit parts. A common anode terminal is connected to an input terminal. Each cathode terminal can be connected to a capacitor terminal of each drive driving circuit part. An LED module comprises the plurality of LED arrays of a common anode type capable of minimizing a pattern of the LED module and the number of wire. The LED module is independently driven by using the plurality of driving circuit parts.
Abstract:
PURPOSE: A display apparatus and a control method thereof are provided to reduce a delay time by controlling a current flowing in an LED from a power supply unit through determining a target current. CONSTITUTION: A current detector(25) detects a current value flowing in an LED. A controller confirms the luminance information of an image signal to be displayed and determines the brightness of the image to be displayed. The controller determines a target current value and supplies it to a current adjusting unit. The controller supplies a virtual target current value to the current adjusting unit. A current adjustment part(31) adjusts the current value flowing from the power supply unit to the LED.