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 13/302 for viewing without the aid of special glasses, i.e. using autostereoscopic displays
- H04N 13/324 Colour aspects
- H04N 13/327 Calibration thereof
- H04N 13/332 Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
- H04N 13/346 using prisms or semi-transparent mirrors
- H04N 13/349 Multi-view displays for displaying three or more geometrical viewpoints without viewer tracking (for viewing without the aid of special glasses using fly-eye lenses H04N13/307)
- H04N 13/356 having separate monoscopic and stereoscopic modes
- 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 13/366 using viewer tracking
- 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 13/388 Volumetric displays, i.e. systems where the image is built up from picture elements distributed through a volume
- H04N 13/398 Synchronisation thereof; Control thereof
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