Indicator lamp, vehicle indicator lamp with said indicator lamp, vehicle exterior member, and vehicle
US11732862B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 30, 2020 |
| Grant date | Aug 22, 2023 |
| Priority date | — |
| Expiry date | Jul 30, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S43/255
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An indicator lamp of the present invention includes a lamp body, a light source unit disposed inside the lamp body, and a light transmissive resin member disposed at a position for transmitting light that is emitted from the light source unit and for outputting the light from the lamp body.The light source unit emits red light having a maximum value of light intensity at a wavelength of 600 nm or longer and 700 nm or shorter. The light transmissive resin member has an L* value of 35 or less, a transmittance of light having a wavelength of 675 nm of 90% or greater and a total light transmittance of 5% or greater in the state in which an optical path length of transmitting light is 2 mm. This configuration provides an indicator lamp with excellent design that shows its presence by showing a red chromatic tone when a light source is turned on and that shows a black color tone when the light source is turned off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.