Video display devices and display bearing calibration

The present invention provides video display devices, can suppress to show the tone variations of video caused by the wavelength change of the light of light source.Video display devices have：Light source portion (110), it has the light source (111R, 111G, 111B) of more than 3 for projecting wavelength light different from each other, and the light of the light source injection from described more than 3 is synthesized and projected；And wavelength detecting portion (134), it is directed to each light source, detection represents the wavelength information of the wavelength of the light projected from the light source, according to the variable quantity of the wavelength detected by the wavelength detecting portion, intensity to the light of the light source is changed, thus, to being synthesized by the light source portion after the color of light be adjusted.