LASER LIGHT SOURCE, PLANAR LIGHT SOURCE, AND LIQUID CRYSTAL DISPLAY DEVICE

摘要

A laser light source drives a light emitting element (101) by a drive current on which a high frequency is superimposed and introduces the emitted light to a polarizing element (102) having a wavelength dependency. Since the polarizing element (102) can emit the incident laser light output in different directions for respective wavelengths, it is possible to change the spread angle of the laser beam when emitting the polarizing element and reduce the speckle.