Yazaki Corporation

Kazuki Kubota

Naohisa Murata

Noriaki Narushima

Jun Shihaku

Kenji Koizumi

A backlight unit includes a light source; a condensing unit that condenses light emitted from the light source; and a diverging unit that diverges the light entering from the condensing unit and that emits the light toward an image display unit of a light transmission type in a head-up display device. For example, the diverging unit is a lens in which both surfaces of an incident surface into which the light from the condensing unit enters as well as an emission surface from which the light is emitted toward the image display unit, are concave surfaces.

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Shimada, Japan

Kazuki Kubota