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PCE
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DIFF Subgroup
H05B 45/50

responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits

Introduced: January 2020

Full Title

Circuit arrangements for operating light-emitting diodes [LED] > responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

IPC defines codes here since 2020.

Child Classifications

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  • H05B 45/52 in a parallel array of LEDs since 2020 IPC+CPC Available in IPC and CPC
  • H05B 45/54 in a series array of LEDs since 2020 IPC+CPC Available in IPC and CPC
  • H05B 45/56 involving measures to prevent abnormal temperature of the LEDs since 2020 IPC+CPC Available in IPC and CPC
  • H05B 45/58 involving end of life detection of LEDs since 2020 IPC+CPC Available in IPC and CPC
  • H05B 45/59 for reducing or suppressing flicker or glow effects since 2022 IPC+CPC Available in IPC and CPC