Display device and method for manufacturing display panel

A display device, comprising:

• a polarizing layer in which a pigment is absorbed on polymer chains so as to have a polarizing function for reflecting or absorbing light polarized in a stretching direction of the pigment;
• a first display panel in which the polarizing function of the polarizing layer is disabled in a first region;
• a second display panel in which the polarizing function of the polarizing layer is disabled in a second region;
• and
• a light source that emits an illumination light having a polarization direction along the stretching direction or along a direction perpendicular to the stretching direction,
• wherein the first display panel and the second display panel are stacked together to form a display unit,
• wherein only the first region is displayed on the display unit by emitting illumination light having a polarization direction along the stretching direction of the first display panel, and
• wherein only the second region is displayed on the display unit by emitting illumination light having a polarization direction along the stretching direction of the second display panel.