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CPC Subgroup
H05B 45/3725

Switched mode power supply [SMPS]

Full Title

Circuit arrangements for operating light-emitting diodes [LED] > Driver circuits > Converter circuits > Switched mode power supply [SMPS]

Filing statistics

CPC H05B 45/3725 belongs to the parent subclass H05B, which recorded 230,577 patent applications worldwide between 2013 and 2023. Annual filings declined from 18,581 in 2013 to 16,528 in 2023 (-11%), peaking at 25,315 applications in 2017. The most active applicants in class H05 are SAMSUNG ELECTRONICS COMPANY (9,981 applications), SAMSUNG DISPLAY (5,041 applications) and LG ELECTRONICS (4,742 applications).

Source: EPO PATSTAT, worldwide filings

6 direct subcodes

Child Classifications

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  • H05B 45/375 using buck topology
  • H05B 45/38 using boost topology
  • H05B 45/382 with galvanic isolation between input and output
  • H05B 45/385 using flyback topology
  • H05B 45/39 Circuits containing inverter bridges
  • H05B 45/392 wherein the LEDs are placed as freewheeling diodes at the secondary side of an isolation transformer

Top Applicants

Top 10 applicants by patent filingsfor class H05, 2013–2023, worldwide · Source: EPO PATSTAT

  1. SAMSUNG ELECTRONICS COMPANY KR 9,981
  2. SAMSUNG DISPLAY KR 5,041
  3. LG ELECTRONICS KR 4,742
  4. PHILIP MORRIS PRODUCTS CH 4,411
  5. PANASONIC INTELLECTUAL PROPERTY JP 3,915
  6. PANASONIC INTELLECTUAL PROPERTY 3,471
  7. SAMSUNG ELECTRO-MECHANICS COMPANY KR 3,210
  8. MURATA MANUFACTURING COMPANY JP 3,191
  9. FUJI JP 2,987
  10. SIGNIFY HOLDING NL 2,907