VEHICULAR ILLUMINATING DEVICE, AND VEHICULAR LIGHTING FIXTURE

• Main Author: MORI KEI
• Format: Patent
• Language: English; Japanese
• Published: 22.03.2022
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; SEMICONDUCTOR DEVICES; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

To provide a vehicular illuminating device that can restrain an effect of thermal deformation of a sealing part, and can improve extraction efficiency of light, and a vehicular lighting fixture.SOLUTION: A vehicular illuminating device 1 comprises: a socket 10; a board 21 provided on the side of one end part of the socket 10; at least one light emitting element 22 provided on the board 21; a frame part 25 provided on the board 21, having a frame shape, and surrounding the light emitting element 22; a sealing part 26 provided inside the frame 25; and an optical element 27 provided on the sealing part 26. The sealing part 26 comprises a first portion 26a provided between the board 21 and the optical element 27, and a second portion 26b provided between the first portion 26a and the optical element 27. The refractive index and linear expansion coefficient of the second portion 26b are different from the refractive index and linear expansion coefficient of the first portion 26a.SELECTED DRAWING: Figure 2 【課題】封止部の熱変形の影響を抑制することができ、且つ、光の取り出し効率を向上させることができる車両用照明装置及び車両用灯具を提供する。【解決手段】車両用照明装置１は、ソケット１０と、ソケット１０の一方の端部側に設けられた基板２１と、基板２１の上に設けられた少なくとも１つの発光素子２２と、基板２１の上に設けられ、枠状を呈し、発光素子２２を囲む枠部２５と、枠部２５の内側に設けられた封止部２６と、封止部２６の上に設けられた光学要素２７と、を具備している。封止部２６は、基板２１と、光学要素２７との間に設けられた第１の部分２６ａと、第１の部分２６ａと、光学要素２７と、の間に設けられた第２の部分２６ｂと、を有している。第２の部分２６ｂの屈折率と線膨張係数は、第１の部分２６ａの屈折率と線膨張係数とは異なる。【選択図】図２