LED traffic light structure
US7281819B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2005 |
| Grant date | Oct 16, 2007 |
| Priority date | — |
| Expiry date | Nov 24, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A traffic light structure includes an LED light source having a circuit board and multiple LEDs securely mounted on the circuit board, a front cover having a first incidence surface provided with multiple lenses each with rectangular lenses and a first emergence surface and an inner cover sandwiched between the front cover and the LED light source and having a second incidence surface and a second emergence surface provided with columns symmetrically arranged relative to a central axis on the second emergence surface. Light of the LEDs scattered and reflected by the inner cover and the front cover is inclined downward to a horizontal axis of the front cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.