Provided is a laser display apparatus in which speckle can be suppressed.
The laser display apparatus includes: a laser comprising a first mirror
and a second mirror that are separated by a cavity distance and form a
cavity; and a spatial modulator modulating light transmitted through the
first mirror of the laser to display an image on a screen, wherein, when
a coherence length l.sub.c and an effective reflectivity R are defined by
the following equation:.times..times..times..pi..times..times..times.
##EQU00001## where d is the cavity distance of the laser, R.sub.1 is the
reflectivity of the first mirror, and R.sub.2 is the reflectivity of the
second mirror, the coherence length l.sub.c satisfies the following
inequality: 0