| CPC G09G 3/32 (2013.01) [G09G 2310/0291 (2013.01); G09G 2310/061 (2013.01)] | 18 Claims |
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1. An LED driver circuit, comprising:
a first component area, comprising a first driving channel group and a second driving channel group, wherein the first driving channel group and the second driving channel group are symmetrically distributed, the first driving channel group and the second driving channel group respectively comprise a same number of driving channels;
a second component area, provided with an analog ground pad connected to a substrate of the driving channels through a metal wire,
wherein each of the driving channels comprises a common-source device module, a common-gate device module and an electrostatic protection module; the common-source device module comprises a first field effect transistor and the common-gate device module comprises a second field effect transistor, a source of the first field effect transistor is grounded, a source of the second field effect transistor is directly connected to a drain of the first field effect transistor and a drain of the second field effect transistor is directly connected to a corresponding output terminal for providing output current,
wherein in each of the driving channels, the first field effect transistor is disposed closer to a symmetry axis between the first driving channel group and the second driving channel group than the second field effect transistor,
wherein in the first component area:
the metal wire comprises a first metal line, a second metal line, a third metal line and a fourth metal line that extend in a same direction separately in parallel, the LED driver circuit further comprises a plurality of output pads and a plurality of power ground pads;
the output pads corresponding to the first driving channel are located between the first metal line and the second metal line, the output pads corresponding to the second driving channel are located between the third metal line and the fourth metal line, and the plurality of power ground pads are located between the second metal line and the third metal line.
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