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    • 2. 发明申请
    • LIGHT EMITTING DIODE DRIVING CIRCUIT, AND DISPLAY DEVICE HAVING THE SAME
    • 发光二极管驱动电路,以及具有该发光二极管驱动电路的显示装置
    • US20120126712A1
    • 2012-05-24
    • US13240616
    • 2011-09-22
    • Yong-Hun KIM
    • Yong-Hun KIM
    • H05B37/02
    • H05B33/0827G09G3/3406
    • Provided are an LED driving circuit capable of preventing distortion of LED currents and having a high operating speed, and a display device including the LED driving circuit. The LED driving circuit includes a current driving circuit, a dynamic headroom controller and a power supply circuit. The current driving circuit controls current signals flowing through LED strings in response to a first control signal that includes information of an LED current and a current-driving-circuit enabling signal. The dynamic headroom controller generates a dynamic headroom control signal having a voltage level that changes according to a logic state of the current-driving-circuit enabling signal. The power supply circuit generates an LED driving voltage that changes according to the dynamic headroom control signal.
    • 提供一种能够防止LED电流变形并具有高工作速度的LED驱动电路,以及包括LED驱动电路的显示装置。 LED驱动电路包括电流驱动电路,动态裕量控制器和电源电路。 电流驱动电路响应于包括LED电流和电流驱动电路使能信号的信息的第一控制信号来控制流过LED串的电流信号。 动态裕量控制器产生具有根据电流驱动电路使能信号的逻辑状态改变的电压电平的动态裕量控制信号。 电源电路产生根据动态余量控制信号而变化的LED驱动电压。
    • 3. 发明申请
    • CIRCUIT AND METHOD OF DRIVING LIGHT EMITTING DIODES, AND LIGHT EMITTING DIODE SYSTEM HAVING THE SAME
    • 驱动发光二极管的电路和方法以及具有该发光二极管的发光二极管系统
    • US20110109243A1
    • 2011-05-12
    • US12840539
    • 2010-07-21
    • Yong-Hun KIMWan-Jung KimHee-Seok Han
    • Yong-Hun KIMWan-Jung KimHee-Seok Han
    • H05B37/02
    • H05B33/0812H05B33/0827Y02B20/345
    • A light-emitting-diode driving circuit includes a current driving circuit configured to control current signals flowing through light-emitting-diode strings in response to a first signal that includes information of a light-emitting-diode current, a dynamic headroom controller configured to generate a third control signal that changes according to a change of the current signals flowing through the light-emitting-diode strings based on voltage signals of first terminals of each of the light-emitting-diode strings and a second control signal that includes the information of the light-emitting-diode current, and a power supply circuit configured to generate a light-emitting-diode driving voltage that changes in response to the third control signal, and provide the light-emitting-diode driving voltage to second terminals of each of the light-emitting-diode strings.
    • 发光二极管驱动电路包括电流驱动电路,其被配置为响应于包括发光二极管电流的信息的第一信号来控制流过发光二极管串的电流信号,动态余量控制器被配置为 基于每个发光二极管串的第一端子的电压信号和包括该信息的第二控制信号,产生根据流过发光二极管串的电流信号的变化而变化的第三控制信号 以及电源电路,其被配置为产生响应于所述第三控制信号而变化的发光二极管驱动电压,并将所述发光二极管驱动电压提供给每个所述第二控制信号的第二端子 的发光二极管串。