Liquid crystal display device
US-2018348421-A1 · Dec 6, 2018 · US
diffraction grating
diffraction grating · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G02F2201/305 |
| Official title | diffraction grating |
| Display label | diffraction grating |
| Total patents | 367 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 15 |
| 2016 | 15 |
| 2017 | 23 |
| 2018 | 38 |
| 2019 | 44 |
| 2020 | 47 |
| 2021 | 40 |
| 2022 | 51 |
| 2023 | 37 |
| 2024 | 27 |
| 2025 | 27 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Display device and display terminal
US-2018348591-A9 · Dec 6, 2018 · US
Display device, display method, and color separation device
US-2018252964-A1 · Sep 6, 2018 · US
Electro-Holographic Light Field Generators and Displays
US-2018217414-A1 · Aug 2, 2018 · US
Liquid crystal grating and method for controlling the same
US-2018217443-A1 · Aug 2, 2018 · US
Optical device and method for manufacturing optical device
US-2018045990-A1 · Feb 15, 2018 · US
Diffractive optical elements with analog modulations and switching
US-9885870-B2 · Feb 6, 2018 · US
Unidirectional grating-based backlighting employing an angularly selective reflective layer
US-2017371090-A1 · Dec 28, 2017 · US
Display Panel and Display Device
US-2017363907-A1 · Dec 21, 2017 · US
Display device and driving method thereof
US-9846320-B2 · Dec 19, 2017 · US
Thermoplastic Optical Device
US-2017357141-A1 · Dec 14, 2017 · US
System and Method for Spectral Tuning of Broadband Light Sources
US-2017350575-A1 · Dec 7, 2017 · US
Two-dimensional/three-dimensional (2d/3d) switchable display backlight and electronic display
US-2017329149-A1 · Nov 16, 2017 · US
Display medium provided with diffraction structure and light control element
US-2017322472-A1 · Nov 9, 2017 · US
Spatial light modulator comprising a liquid crystal device having reduced stray light
US-9810948-B2 · Nov 7, 2017 · US
Apparatus for eye tracking
US-9804389-B2 · Oct 31, 2017 · US
Unidirectional grating-based backlighting employing a reflective island
US-2017307800-A1 · Oct 26, 2017 · US
Diffraction grating-based backlighting having controlled diffractive coupling efficiency
US-2017299793-A1 · Oct 19, 2017 · US
Semiconductor laser device
US-9793681-B2 · Oct 17, 2017 · US
Liquid crystal grating, manufacturing method and drive method thereof, and optical phased array device
US-9785016-B2 · Oct 10, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G02F2201/305?
- CPC G02F2201/305 is the Cooperative Patent Classification code for “diffraction grating.”
- How many patents are filed under CPC G02F2201/305 (diffraction grating)?
- Our database includes 367 publications tagged with this CPC code.
- Is patent activity under CPC G02F2201/305 growing?
- Publication counts under this code: 27 in 2024 vs 27 in 2025 (latest complete years).