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
- HUAWEI TECHNOLOGIES COMPANY CN 101,476
- QUALCOMM US 101,139
- SAMSUNG ELECTRONICS COMPANY KR 96,655
- TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 57,744
- LG ELECTRONICS KR 55,253
- HUAWEI TECHNOLOGIES COMPANY 54,181
- SONY CORPORATION JP 35,309
- ZTE CORPORATION CN 32,950
- INTEL CORPORATION US 27,533
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION CN 27,498