US 12,442,974 B2
Vehicular laminated glass having a light source and an optical element for introducing light into the glass
Takanori Matsushima, Tokyo (JP); Kenichiro Shimo, Tokyo (JP); Yusuke Ikeda, Tokyo (JP); Masanobu Ogawa, Tokyo (JP); and Hidenori Takai, Tokyo (JP)
Assigned to AGC INC., Tokyo (JP)
Filed by AGC Inc., Tokyo (JP)
Filed on Aug. 6, 2024, as Appl. No. 18/796,039.
Application 18/796,039 is a continuation of application No. PCT/JP2023/003383, filed on Feb. 2, 2023.
Claims priority of application No. 2022-018729 (JP), filed on Feb. 9, 2022.
Prior Publication US 2024/0393525 A1, Nov. 28, 2024
Int. Cl. F21V 8/00 (2006.01); B32B 17/10 (2006.01)
CPC G02B 6/0095 (2013.01) [B32B 17/10036 (2013.01); B32B 17/1044 (2013.01); B32B 17/10541 (2013.01); B32B 17/10761 (2013.01); G02B 6/0031 (2013.01); B32B 2605/00 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A vehicular laminated glass comprising:
a first glass plate having a first main surface and a second main surface;
a second glass plate having a third main surface and a fourth main surface;
an adhesive interlayer disposed between the second main surface and the third main surface;
a light source which faces the fourth main surface and applies light toward the fourth main surface; and
an optical element which disposed between the fourth main surface and the light source and refracts irradiation light from the light source,
wherein the optical element has a light-receiving surface facing the light source,
wherein the refractive index n2 of the optical element is higher than the refractive index n3 of the second glass plate, and
wherein the refractive index n2 of the optical element, the refractive index n3 of the second glass plate, and the angle θp, formed by the fourth main surface and the light-receiving surface, satisfy the following formula:
sin θp<(n3/n2).