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CPC Subgroup
H04N 13/366

using viewer tracking

Full Title

Stereoscopic video systems; Multi-view video systems; Details thereof > Image reproducers (optical systems for producing stereoscopic or other three-dimensional [3D] effects G02B30/00) > using viewer tracking

7 direct subcodes

Child Classifications

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  • H04N 13/368 for two or more viewers
  • H04N 13/371 for tracking viewers with different interocular distances; for tracking rotational head movements around the vertical axis
  • H04N 13/373 for tracking forward-backward translational head movements, i.e. longitudinal movements
  • H04N 13/376 for tracking left-right translational head movements, i.e. lateral movements
  • H04N 13/378 for tracking rotational head movements around an axis perpendicular to the screen
  • H04N 13/38 for tracking vertical translational head movements
  • H04N 13/383 for tracking with gaze detection, i.e. detecting the lines of sight of the viewer's eyes

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