A lamp bead, comprising a packaging housing , one or more LED lamps and an LED lamp driving chip ; wherein the LED lamps and the LED lamp driving chip are arranged in the packaging housing ; a power positive pole connection terminal , a signal connection terminal and a power negative pole connection terminal which are arranged longitudinally are exposed on an outer side of the bottom of the packaging housing ; the signal connection terminal is an IO port and comprises a first signal connection terminal and a second signal connection terminal which are transversely arranged; the power positive pole connection terminal , the signal connection terminal and the power negative pole connection terminal pass through the bottom of the packaging housing ; a first signal end and a second signal end of the LED lamp driving chip are connected to the first signal connection terminal and the second signal connection terminal , respectively; a power positive pole input end and a power negative pole input end of the LED lamp driving chip are connected to the power positive pole connection terminal and the power negative pole connection terminal , respectively; anodes of the one or more LED lamps are connected to the power positive pole connection terminal ; and cathodes of the one or more LED lamps are connected to one or more LED input ends of the LED lamp driving chip in a one-to-one correspondence manner, respectively; a lamp strip, comprising a plurality of the lamp beads, wherein first signal connection terminals and second signal connection terminals of the plurality of lamp beads are sequentially connected in series, power positive pole connection terminals of the plurality of lamp beads are connected with each other, and power negative pole connection terminals of the plurality of lamp beads are connected with each other. the LED lamps and the LED lamp driving chip are arranged in the packaging housing ; a power positive pole connection terminal , a signal connection terminal and a power negative pole connection terminal which are arranged longitudinally are exposed on an outer side of the bottom of the packaging housing ; the signal connection terminal is an IO port and comprises a first signal connection terminal and a second signal connection terminal which are transversely arranged; the power positive pole connection terminal , the signal connection terminal and the power negative pole connection terminal pass through the bottom of the packaging housing ; a first signal end and a second signal end of the LED lamp driving chip are connected to the first signal connection terminal and the second signal connection terminal , respectively; a power positive pole input end and a power negative pole input end of the LED lamp driving chip are connected to the power positive pole connection terminal and the power negative pole connection terminal , respectively; anodes of the one or more LED lamps are connected to the power positive pole connection terminal ; and cathodes of the one or more LED lamps are connected to one or more LED input ends of the LED lamp driving chip in a one-to-one correspondence manner, respectively; a lamp strip, comprising a plurality of the lamp beads, wherein first signal connection terminals and second signal connection terminals of the plurality of lamp beads are sequentially connected in series, power positive pole connection terminals of the plurality of lamp beads are connected with each other, and power negative pole connection terminals of the plurality of lamp beads are connected with each other. <EOS>