Display device and illumination device

A display device comprising:

• a polymer dispersion type liquid crystal panel;
• a light source device configured to emit illumination light that is incident to an end face of the polymer dispersion type liquid crystal panel;
• a display panel configured to modulate the illumination light which propagates through the polymer dispersion type liquid crystal panel and is dispersed by the polymer dispersion type liquid crystal panel;
• and
• an illumination device controlling unit,
• wherein
• the polymer dispersion type liquid crystal panel includes a plurality of sub illumination regions, in which, switching between a scattering state where the illumination light is scattered and a non-scattering state where the illumination light is not scattered, are independently controlled by applying a voltage to a liquid crystal layer,
• in the sub illumination region, a plurality of first electrodes for applying the voltage to the liquid crystal layer are aligned,
• the plurality of first electrodes are respectively divided into a plurality of groups in which every or a plurality of first electrodes are electrically connected each other,
• the sub illumination region includes a plurality of divided sub illumination regions, in which the switching between the scattering state and the non-scattering state are independently controlled, corresponding to the plurality of groups, and
• the illumination device controlling unit is configured to select one or a plurality of divided sub illumination regions from among the divided sub illumination regions for each sub illumination region and differentiate time for applying the voltage to the liquid crystal layer according to the number of selected divided sub illumination regions.