There is provided a device capable of switching between a state that
displays a high-quality image and a mirror status in which is obtained an
easy-to-view reflection image suitable for a person to view his/her own
face or figure. An image display portion 1000 that emits image light
3001, reflective polarization selection means 300 that transmits a first
linear polarization component emitted from the image display portion 1000
and reflects a second linear polarization component, whose polarization
axis is orthogonal to that of the first linear polarization component, a
transmission polarization axis variable portion 400 capable of selecting
between one of a state that changes the polarization axis of incident
linearly polarized light and a state that does not change the
polarization axis of incident linearly polarized light, and a
polarization selection member 500 which, of the incident light, absorbs
the first linear polarization component and transmits the second linear
polarization component, whose polarization axis is orthogonal to that of
the first linear polarization component, are disposed in this order. In
this case, absorbing polarization selection means 208 is disposed at the
image display portion 1000, and the first linear polarization is emitted
as the image light.