Head-up display device

A head-up display device configured to be mounted on a movable object and to project a display light through a projection window onto a projection member to display a virtual image visibly recognizable by an occupant, the head-up display device comprising:

• a display light projection unit configured to project an image as the display light including a plurality of wavelengths in a visible region;
• and
• a light guide unit configured to guide the display light from the display light projection unit toward the projection member, wherein
• the light guide unit includes a multilayer film filter unit configured to transmit the display light and to shield an external light incident from the projection window by using an optical multilayer film,
• in the XYZ color system, a wavelength region between a wavelength at which a value of a color matching function Z is maximum and a wavelength at which a value of a color matching function Y is maximum is defined as a first wavelength region, and a wavelength region between the wavelength at which the value of the color matching function Y is maximum and a wavelength at which a value of a color matching function X is maximum is defined as a second wavelength region,
• a transmittance of the multilayer film filter unit with respect to the display light, which takes a minimum value among transmittances of respective wavelengths in a target wavelength region, is defined as a minimum transmittance, and
• the minimum transmittance in the first wavelength region is smaller than the minimum transmittance in the second wavelength region.