Title:
VEHICULAR LIGHTING DEVICE AND VEHICULAR LIGHTING FIXTURE
Document Type and Number:
Japanese Patent JP2021182523
Kind Code:
A
Abstract:
To provide a vehicular lighting device that can be improved in heat radiating property, miniaturized and reduce weight, and to provide a vehicular lighting fixture.SOLUTION: A vehicular lighting device 1 includes: a socket 10 including a flange 13, a fitting part 11 provided on one end side of the flange, a heat radiation fin 14 installed to the flange on an opposite side to the side of the fitting part and a high-heat conductive resin; a light-emitting module 20 provided in an end of the fitting part which is located on an opposite side to the side of the flange and including at least one light-emitting element 22; and a heat transfer part 40 provided between the fitting part and the light-emitting module and including a metal. The vehicular lighting device satisfies the following formulae: 2.5[watt]≤W≤5.5[watt]; 15[watt/(m K)]≤WT≤25[watt/(m K)]; and 40[1/K]≤(A1-A2)×WT/W≤90[1/K], where W[watt] represents power to be applied to the light-emitting module and WT[watt/(m K)] represents heat conductivity of the high-heat conductive resin.SELECTED DRAWING: Figure 2
Inventors:
HINO KIYOKAZU
Application Number:
JP2020087872A
Publication Date:
November 25, 2021
Filing Date:
May 20, 2020
Export Citation:
Assignee:
TOSHIBA LIGHTING & TECHNOLOGY
International Classes:
F21S45/47; F21S43/14; F21S43/19; F21V19/00; F21V29/503; F21V29/74; F21V29/87; H01L33/00
Domestic Patent References:
| JP2018063851A | 2018-04-19 |
Foreign References:
| US20160215948A1 | 2016-07-28 |
Attorney, Agent or Firm:
Hiroshi Ichikawa
Tatsutetsu Shirai
Kohei Hoshino
Tatsutetsu Shirai
Kohei Hoshino