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CPC Subgroup
H04N 23/70

Circuitry for compensating brightness variation in the scene

Full Title

Cameras or camera modules comprising electronic image sensors; Control thereof > Circuitry for compensating brightness variation in the scene

10 direct subcodes

Child Classifications

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  • H04N 23/71 Circuitry for evaluating the brightness variation
  • H04N 23/72 Combination of two or more compensation controls
  • H04N 23/73 by influencing the exposure time
  • H04N 23/74 by influencing the scene brightness using illuminating means
  • H04N 23/741 by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors
  • H04N 23/743 Bracketing, i.e. taking a series of images with varying exposure conditions
  • H04N 23/745 Detection of flicker frequency or suppression of flicker wherein the flicker is caused by illumination, e.g. due to fluorescent tube illumination or pulsed LED illumination
  • H04N 23/75 by influencing optical camera components
  • H04N 23/76 by influencing the image signals

Top Applicants

Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. HUAWEI TECHNOLOGIES COMPANY CN 101,476
  2. QUALCOMM US 101,139
  3. SAMSUNG ELECTRONICS COMPANY KR 96,655
  4. TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 57,744
  5. LG ELECTRONICS KR 55,253
  6. HUAWEI TECHNOLOGIES COMPANY 54,181
  7. SONY CORPORATION JP 35,309
  8. ZTE CORPORATION CN 32,950
  9. INTEL CORPORATION US 27,533
  10. GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION CN 27,498