H04N 9/3144
Cooling systems
Official title: {Cooling systems (cooling of liquid crystal cells in general G02F1/133382; cooling of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/16)}
H04N9/3144 (Cooling systems) appears on 816 US grants and 897 published applications in this corpus.
Search patents in H04N- Granted patents
- 816
- Published applications
- 897
- Assignees
- 185
- Inventors
- 1,345
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 8 | 0 |
| 1999 | 8 | 0 |
| 2000 | 16 | 0 |
| 2001 | 8 | 3 |
| 2002 | 15 | 20 |
| 2003 | 16 | 18 |
| 2004 | 16 | 37 |
| 2005 | 27 | 51 |
| 2006 | 36 | 43 |
| 2007 | 24 | 38 |
| 2008 | 26 | 22 |
| 2009 | 20 | 24 |
| 2010 | 19 | 25 |
| 2011 | 29 | 43 |
| 2012 | 17 | 30 |
| 2013 | 30 | 41 |
| 2014 | 16 | 36 |
| 2015 | 41 | 42 |
| 2016 | 48 | 49 |
| 2017 | 49 | 61 |
| 2018 | 48 | 62 |
| 2019 | 68 | 58 |
| 2020 | 61 | 64 |
| 2021 | 44 | 39 |
| 2022 | 37 | 29 |
| 2023 | 25 | 18 |
| 2024 | 21 | 21 |
| 2025 | 15 | 14 |
| 2026 | 11 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Projector with thermally managed optical path shifting module and thermoelectric panel cooling25 Aug 2026US 12,720,022 B2Seiko Epson Corporation
- Light transmissive optical element module and electronic instrument23 Jun 2026US 12,663,672 B2Seiko Epson Corporation
- Light engine and projection device23 Jun 2026US 12,665,990 B2Formovie (Chongqing) Innovative Tech. Co., Ltd.
- Display device with vapor chamber housing phase-changeable working fluid21 Apr 2026US 12,607,918 B2Seiko Epson Corporation
- Projection display apparatus7 Apr 2026US 12,598,276 B2Sony Group Corporation
- Electronic instrument24 Sep 2026US 2026/0292110 A1Seiko Epson Corporation
- Projector and light modulator9 Jul 2026US 2026/0194797 A1Seiko Epson Corporation
- Phosphor wheel device and image projection apparatus including the same4 Jun 2026US 2026/0156233 A1LG Electronics Inc.
- Adjustable Projector28 May 2026US 2026/0147260 A1Shenzhen Oceanwing Smart Innovations Technology Co., Ltd
- Cooled light source apparatus and projection type image display apparatus with noise-reducing fan system21 May 2026US 2026/0140430 A1Maxell, Ltd.
Most cited
By later US patents
- High intensity lighting projectors319US 5,282,121 AVari-Lite, Inc. · 1994
- Liquid crystal display panel including a light shielding film to control incident light262US 6,628,355 B1Matsushita Electric Industrial Co., Ltd. · 2003
- Bandpass filter to reduce thermal impact of dichroic light shift230US 6,549,338 B1Texas Instruments Incorporated · 2003
- Method and apparatus for driving an active matrix display panel175US 6,219,113 B1Matsushita Electric Industrial Co., Ltd. · 2001
- Optical lens unit having internalized fan unit and projection apparatus housing the same145US 6,007,205 ASeiko Epson Corporation · 1999