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PCE
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CPC Subgroup
H05B 45/50

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

Full Title

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

5 direct subcodes

Child Classifications

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

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