H04N 9/31
Projection devices for colour picture display
Official title: Projection devices for colour picture display {, e.g. using electronic spatial light modulators [ESLM]}
H04N9/31 (Projection devices for colour picture display) appears on 13,334 US grants and 14,715 published applications in this corpus.
Search patents in H04N- Granted patents
- 13,334
- Published applications
- 14,715
- Assignees
- 2,187
- Inventors
- 16,306
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 13 | 0 |
| 1978 | 6 | 0 |
| 1979 | 8 | 0 |
| 1980 | 19 | 0 |
| 1981 | 15 | 0 |
| 1982 | 7 | 0 |
| 1983 | 20 | 0 |
| 1984 | 16 | 0 |
| 1985 | 14 | 0 |
| 1986 | 10 | 0 |
| 1987 | 27 | 0 |
| 1988 | 19 | 0 |
| 1989 | 25 | 0 |
| 1990 | 42 | 0 |
| 1991 | 53 | 0 |
| 1992 | 75 | 0 |
| 1993 | 70 | 0 |
| 1994 | 112 | 0 |
| 1995 | 105 | 0 |
| 1996 | 112 | 0 |
| 1997 | 133 | 0 |
| 1998 | 164 | 0 |
| 1999 | 137 | 0 |
| 2000 | 166 | 0 |
| 2001 | 209 | 88 |
| 2002 | 230 | 329 |
| 2003 | 308 | 379 |
| 2004 | 310 | 512 |
| 2005 | 327 | 730 |
| 2006 | 479 | 770 |
| 2007 | 437 | 677 |
| 2008 | 432 | 595 |
| 2009 | 331 | 626 |
| 2010 | 389 | 562 |
| 2011 | 456 | 586 |
| 2012 | 473 | 558 |
| 2013 | 468 | 589 |
| 2014 | 492 | 581 |
| 2015 | 581 | 636 |
| 2016 | 594 | 760 |
| 2017 | 652 | 761 |
| 2018 | 685 | 764 |
| 2019 | 758 | 760 |
| 2020 | 729 | 765 |
| 2021 | 629 | 670 |
| 2022 | 581 | 564 |
| 2023 | 469 | 449 |
| 2024 | 392 | 393 |
| 2025 | 304 | 358 |
| 2026 | 245 | 253 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04N 9/3141Constructional details thereof8,377
- H04N 9/3102Using two-dimensional electronic spatial light modulators4,174
- H04N 9/3179Video signal processing therefor3,997
- H04N 9/3191Testing thereof2,885
- H04N 9/3129Scanning a light beam on the display screen1,810
- H04N 9/3197Using light modulating optical valves358
- H04N 9/3138Using arrays of modulated light sources196
Recent patents
- Illumination system and projection device6 Oct 2026US 12,754,469 B2Qisda Corporation
- Multi-projector system and method of calibrating multi-projector system6 Oct 2026US 12,756,799 B2Coretronic Corporation
- Image processing apparatus, image processing method, and image processing program6 Oct 2026US 12,756,800 B2FUJIFILM Corporation
- Display system, non-transitory computer-readable storage medium storing program, and control device6 Oct 2026US 12,756,801 B2Seiko Epson Corporation
- Projector6 Oct 2026US 12,756,802 B2Seiko Epson Corporation
- Display method, display device, electronic equipment, storage medium and program product8 Oct 2026US 2026/0313077 A1Xiaomi EV Technology Co., Ltd.
- Image correction method8 Oct 2026US 2026/0313078 A1Seiko Epson Corporation
- Pixel shifting methods in projection systems8 Oct 2026US 2026/0313079 A1Dolby Laboratories Licensing Corporation
- Projection method, projection apparatus, and non-transitory computer-readable storage medium storing program8 Oct 2026US 2026/0313080 A1Seiko Epson Corporation
- Control method for projection apparatus, projection system, and non-transitory computer-readable storage medium storing program8 Oct 2026US 2026/0313081 A1Seiko Epson Corporation
Most cited
By later US patents
- Panoramic display system611US 5,130,794 A1992
- Multi-level deformable mirror device574US 5,083,857 ATexas Instruments Incorporated · 1992
- Single crystal silicon arrayed devices for display panels540US 5,317,236 AKopin Corporation · 1994
- Variable intensity high contrast passive display504US 5,717,422 A1998
- DMD display system492US 5,452,024 ATexas Instruments Incorporated · 1995