US 12,281,774 B2
Vehicle lamp having excitation light source, light conversion unit, and red lens
Yoshiro Sato, Isehara (JP); and Naotoshi Sakakibara, Isehara (JP)
Assigned to Ichikoh Industries, Ltd., Isehara (JP)
Appl. No. 18/253,144
Filed by Ichikoh Industries, Ltd., Isehara (JP)
PCT Filed Nov. 16, 2021, PCT No. PCT/JP2021/042048
§ 371(c)(1), (2) Date May 16, 2023,
PCT Pub. No. WO2022/102785, PCT Pub. Date May 19, 2022.
Claims priority of application No. 2020-190350 (JP), filed on Nov. 16, 2020; and application No. 2021-178245 (JP), filed on Oct. 29, 2021.
Prior Publication US 2023/0417388 A1, Dec. 28, 2023
Int. Cl. F21S 43/16 (2018.01); B60Q 1/44 (2006.01); F21S 43/20 (2018.01); F21S 43/30 (2018.01); B60Q 1/30 (2006.01); B60Q 1/34 (2006.01)
CPC F21S 43/16 (2018.01) [F21S 43/26 (2018.01); F21S 43/30 (2018.01); B60Q 1/30 (2013.01); B60Q 1/34 (2013.01); B60Q 1/44 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A vehicle lamp, comprising:
a lamp housing and a lamp lens that form a lamp chamber; and
an excitation-light irradiation unit and a light conversion unit disposed in the lamp chamber, wherein the excitation-light irradiation unit has:
an excitation light source that emits excitation light; and
an excitation-light final irradiation surface that finally irradiates the light conversion unit with the excitation light emitted from the excitation light source;
the light conversion unit has:
a light emitting film that emits secondary light by the excitation light emitted from the excitation-light final irradiation surface;
a reflection film that reflects the secondary light emitted from the light emitting film toward the light emitting film side; and
a secondary-light emitting surface that emits the secondary light toward the lamp lens side;
the excitation light has a dominant wavelength shorter than 500 nm, the secondary light has a dominant wavelength longer than 500 nm, and the lamp lens is constituted by a red lens;
the excitation-light final irradiation surface is disposed on the lamp lens side with respect to the secondary-light emitting surface;
the excitation light source is disposed on a side opposite to the lamp lens with respect to the secondary-light emitting surface;
an optical component is disposed on the lamp lens side with respect to the secondary-light emitting surface; and
the optical component is provided with the excitation-light final irradiation surface.