Methods and apparatus for controlling display backlight
US-10877314-B2 · Dec 29, 2020 · US
of two or more light sources connected in series
of two or more light sources connected in series · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H05B47/23 |
| Official title | of two or more light sources connected in series |
| Display label | of two or more light sources connected in series |
| Total patents | 86 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 9 |
| 2017 | 9 |
| 2018 | 12 |
| 2019 | 10 |
| 2020 | 19 |
| 2021 | 5 |
| 2022 | 8 |
| 2023 | 2 |
| 2024 | 5 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Vehicle lighting device
US-10869375-B2 · Dec 15, 2020 · US
Devices, methods, and systems for alternating current circuits for airfield lighting
US-10806005-B2 · Oct 13, 2020 · US
Backlight test circuit, backlight test method and backlight module using the same
US-10782335-B2 · Sep 22, 2020 · US
Carrier controlled light-emitting diode light and light-emitting diode light string having the same
US-10779379-B2 · Sep 15, 2020 · US
Carrier controlled light-emitting diode light and light-emitting diode light string having the same
US-2020214098-A1 · Jul 2, 2020 · US
Method for detecting a defect in an led string and electronic circuit with at least one led string
US-2020187323-A1 · Jun 11, 2020 · US
Device, system, and method for determining an address of a component arranged in a structure
US-10667369-B2 · May 26, 2020 · US
Illumination lighting apparatus, illumination device, and illumination fixture
US-10638586-B2 · Apr 28, 2020 · US
Airfield runway lamp controller
US-10638574-B2 · Apr 28, 2020 · US
Illumination lighting apparatus, illumination device, and illumination fixture
US-2020107421-A1 · Apr 2, 2020 · US
Programmable feed-forward regulation
US-10609796-B2 · Mar 31, 2020 · US
Resistive bypass for series lighting circuit
US-2020100347-A1 · Mar 26, 2020 · US
Vehicle lighting device
US-2020092969-A1 · Mar 19, 2020 · US
Device, system, and method for determining an address of a component arranged in a structure
US-2020077493-A1 · Mar 5, 2020 · US
Devices, methods, and systems for alternating current circuits for airfield lighting
US-2020068676-A1 · Feb 27, 2020 · US
Resistive bypass for series lighting circuit
US-10492282-B2 · Nov 26, 2019 · US
Devices, methods, and systems for alternating current circuits for airfield lighting
US-10485064-B2 · Nov 19, 2019 · US
Airfield runway lamp controller
US-2019261499-A1 · Aug 22, 2019 · US
Devices, methods, and systems for alternating current circuits for airfield lighting
US-2019215922-A1 · Jul 11, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H05B47/23?
- CPC H05B47/23 is the Cooperative Patent Classification code for “of two or more light sources connected in series.”
- How many patents are filed under CPC H05B47/23 (of two or more light sources connected in series)?
- Our database includes 86 publications tagged with this CPC code.
- Is patent activity under CPC H05B47/23 growing?
- Publication counts under this code: 5 in 2024 vs 2 in 2025 (latest complete years).