Abstract: A vehicle lamp includes: a first light source; and a light guide including a rod-shaped part and a plate-shaped part. The light guide has a structure in which a circumferential surface of the rod-shaped part is connected to a side surface of the plate-shaped part. The plate-shaped part includes a light diffusion member inside. Light of the first light source is incident on the rod-shaped part from one end of the rod-shaped part, enters the plate-shaped part from the circumferential surface of the rod-shaped part, and is output by the light diffusion member from a principal surface of the plate-shaped part.

Abstract: A light guide is configured to allow at least a portion of light incident on a light-incident surface to be emitted through a peripheral surface. The light guide includes a light guide portion extending in a lengthwise direction of the light guide and formed of a first material and a luminous portion extending in the lengthwise direction of the light guide along the light guide portion and formed of a second material. The second material has a haze value greater than a haze value of the first material.

Abstract: A light guide for a vehicle lamp includes a rod-shaped portion and a plate-shaped portion. The rod-shaped portion includes a rod-shaped light guide portion and a connecting projection portion projecting from a peripheral surface of the rod-shaped light guide portion and extending along the rod-shaped light guide portion. The plate-shaped portion includes two principal surfaces facing opposite to each other and a plate-shaped portion side surface connecting the two principal surfaces. The light guide is a multi-color molded product in which the rod-shaped portion is formed of a first resin material and the plate-shaped portion is formed of a second resin material containing a light diffusing agent. The rod-shaped light guide portion is connected to the side surface of the plate-shaped portion by the connecting projection portion.

Abstract: A lamp includes a light source, a controller that controls an output of the light source, and a light emitting unit that reflects the light emitted from the light source one or more times and emits the reflected light. The light emitting unit includes an incident portion, a light guide path, a reflecting portion, and an emitting portion, and is configured to increase a light emitting area that emits light with brightness equal to or higher than an estimated value of the brightness in the emitting portion in accordance with an increase in the output of the light source.

Abstract: A vehicle lamp includes: a first light source; and a light guide including a rod-shaped part and a plate-shaped part. The light guide has a structure in which a circumferential surface of the rod-shaped part is connected to a side surface of the plate-shaped part. The plate-shaped part includes a light diffusion member inside. Light of the first light source is incident on the rod-shaped part from one end of the rod-shaped part, enters the plate-shaped part from the circumferential surface of the rod-shaped part, and is output by the light diffusion member from a principal surface of the plate-shaped part.

Abstract: A light guide is configured to allow at least a portion of light incident on a light-incident surface to be emitted through a peripheral surface. The light guide includes a light guide portion extending in a lengthwise direction of the light guide and formed of a first material and a luminous portion extending in the lengthwise direction of the light guide along the light guide portion and formed of a second material. The second material has a haze value greater than a haze value of the first material.

Abstract: A light guide for a vehicle lamp includes a rod-shaped portion and a plate-shaped portion. The rod-shaped portion includes a rod-shaped light guide portion and a connecting projection portion projecting from a peripheral surface of the rod-shaped light guide portion and extending along the rod-shaped light guide portion. The plate-shaped portion includes two principal surfaces facing opposite to each other and a plate-shaped portion side surface connecting the two principal surfaces. The light guide is a multi-color molded product in which the rod-shaped portion is formed of a first resin material and the plate-shaped portion is formed of a second resin material containing a light diffusing agent. The rod-shaped light guide portion is connected to the side surface of the plate-shaped portion by the connecting projection portion.