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    • 3. 发明授权
    • Driving system of light emitting diode
    • 发光二极管驱动系统
    • US07724220B2
    • 2010-05-25
    • US11651539
    • 2007-01-10
    • Cheng-Chi YenYung-Yuan HoYen-Chen Chen
    • Cheng-Chi YenYung-Yuan HoYen-Chen Chen
    • G09G3/32
    • H05B33/086H05B33/0818Y02B20/347
    • The invention relates to an LED current driving system. The LED current driving system comprises an LED driver. The LED driver comprises at least one LED driving unit for outputting a driving current to an LED. Each LED driving unit comprises a plurality of current sources and a plurality of switches. The switches are connected to the corresponding current source. Each switch controls the ON/OFF state of the corresponding current source in accordance with the duty cycle control signal and a current control signal. Therefore, by integrating the LED driver on the LCOS panel, the LED current driving system of the invention can decrease the pin number of the LCOS chip, the overall area and the system cost so as to improve the yield of the LED current driving system. Besides, the LED current driving system utilizes the current sources to form the driving current to stably and precisely control the driving current flowing through the corresponding LED so that the color quality of the image can be improved.
    • 本发明涉及一种LED电流驱动系统。 LED电流驱动系统包括LED驱动器。 LED驱动器包括用于向LED输出驱动电流的至少一个LED驱动单元。 每个LED驱动单元包括多个电流源和多个开关。 开关连接到相应的电流源。 每个开关根据占空比控制信号和电流控制信号控制相应电流源的ON / OFF状态。 因此,通过将LED驱动器集成在LCOS面板上,本发明的LED电流驱动系统可以降低LCOS芯片的引脚数,整体面积和系统成本,从而提高LED电流驱动系统的产量。 此外,LED电流驱动系统利用电流源形成驱动电流,以稳定且精确地控制流过对应的LED的驱动电流,从而可以提高图像的色彩质量。
    • 4. 发明申请
    • Driving system of light emitting diode
    • 发光二极管驱动系统
    • US20070159434A1
    • 2007-07-12
    • US11651539
    • 2007-01-10
    • Cheng-Chi YenYung-Yuan HoYen-Chen Chen
    • Cheng-Chi YenYung-Yuan HoYen-Chen Chen
    • G09G3/36
    • H05B33/086H05B33/0818Y02B20/347
    • The invention relates to an LED current driving system. The LED current driving system comprises an LED driver. The LED driver comprises at least one LED driving unit for outputting a driving current to an LED. Each LED driving unit comprises a plurality of current sources and a plurality of switches. The switches are connected to the corresponding current source. Each switch controls the ON/OFF state of the corresponding current source in accordance with the duty cycle control signal and a current control signal. Therefore, by integrating the LED driver on the LCOS panel, the LED current driving system of the invention can decrease the pin number of the LCOS chip, the overall area and the system cost so as to improve the yield of the LED current driving system. Besides, the LED current driving system utilizes the current sources to form the driving current to stably and precisely control the driving current flowing through the corresponding LED so that the color quality of the image can be improved.
    • 本发明涉及一种LED电流驱动系统。 LED电流驱动系统包括LED驱动器。 LED驱动器包括用于向LED输出驱动电流的至少一个LED驱动单元。 每个LED驱动单元包括多个电流源和多个开关。 开关连接到相应的电流源。 每个开关根据占空比控制信号和电流控制信号控制相应电流源的ON / OFF状态。 因此,通过将LED驱动器集成在LCOS面板上,本发明的LED电流驱动系统可以降低LCOS芯片的引脚数,整体面积和系统成本,从而提高LED电流驱动系统的产量。 此外,LED电流驱动系统利用电流源形成驱动电流,以稳定且精确地控制流过对应的LED的驱动电流,从而可以提高图像的色彩质量。