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CPC Subgroup
H04N 13/30

Image reproducers (optical systems for producing stereoscopic or other three-dimensional [3D] effects G02B30/00)

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)

15 direct subcodes

Child Classifications

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  • H04N 13/324 Colour aspects
  • H04N 13/327 Calibration thereof
  • H04N 13/346 using prisms or semi-transparent mirrors
  • H04N 13/361 Reproducing mixed stereoscopic images; Reproducing mixed monoscopic and stereoscopic images, e.g. a stereoscopic image overlay window on a monoscopic image background
  • H04N 13/363 using image projection screens (volumetric display H04N13/388)
  • H04N 13/365 using digital micromirror devices [DMD]
  • H04N 13/385 alternating rapidly the location of the left-right image components on the display screens (for viewing without the aid of special glasses using time variant parallax barriers H04N13/315; displays for viewing with the aid of special glasses or head-mounted displays using temporal multiplexing H04N13/341)
  • H04N 13/398 Synchronisation thereof; Control thereof

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