Traffic signal lamp, traffic signal system and lamp-state detection method using the same
US12317395B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2023 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Jul 27, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/095
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A traffic signal lamp includes a plurality of light-emitting devices. Each light-emitting device includes a light-emitting element, a power distribution module, a power module, a controller and a measuring element. The power module is configured for converting an alternating current (AC) into a direct current (DC) and supplying the DC to the light-emitting element and the power distribution module. The measuring element is electrically coupled to the power distribution module and the light-emitting element. The controller is electrically coupled to the power distribution module and the measuring element. When a selected-one of the light-emitting devices receives the AC, the power distribution modules of the selected-one provides the DC to the controller and the measuring element of the selected-one and the power distribution module of the others of the light-emitting devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.