发明名称 |
Control Device and LED Light Emitting Device Using the Control Device |
摘要 |
The present invention relates to a control device of a light emitting device that includes a plurality of LED rows formed of a plurality of LEDs sequentially connected in series. The control device includes: a plurality of switches respectively connected to the plurality of LED rows and sequentially transmitting a detection voltage of each of the plurality of LED rows, wherein the detection voltage corresponds to an output voltage applied to the plurality of LED rows; a comparator receiving the plurality of detection voltages, and generating a clock control signal according to a result of comparison with a predetermined reference; a clock signal generator generating a clock signal having a period that is changed according to the clock control signal; and a shift register that controls switching operations of the plurality of switches according to the clock signal.
|
申请公布号 |
US2010110059(A1) |
申请公布日期 |
2010.05.06 |
申请号 |
US20090612819 |
申请日期 |
2009.11.05 |
申请人 |
KANG EUNCHUL;KWON DUCKKI;KIM JUHO |
发明人 |
KANG EUNCHUL;KWON DUCKKI;KIM JUHO |
分类号 |
G09G5/00;G09G3/32 |
主分类号 |
G09G5/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|