Patent ID: 8384853
Filing Date: 2013-02-26
Classification: G02F

Abstract:
1. A display comprising an image display device that displays an image and a viewing angle control element that is laminated on the image display device and that controls a viewing angle of the image display device, the viewing angle control element comprises: a first light-shielding layer that comprises an optical element having a birefringence and at least one polarizing plate that comprises an emission-side polarizing plate arranged on an emission side of the optical element, and when light having wavelength components in the visible wavelength region, including at least a part of light having a first wavelength component in the visible wavelength region, enters at least at a predetermined angle, the optical element provides a phase difference so as to shield the light of the first wavelength component so as not to pass through the emission-side polarizing plate, and at least one auxiliary light-shielding layer that comprises an optical element having a birefringence and at least one polarizing plate that comprises an emission-side polarizing plate arranged on the emission side of the optical element, and when the remaining light having wavelength components in the visible wavelength region not including the first wavelength component that has passed through the first light-shielding layer enters at least at the predetermined angle, the optical element provides a phase difference so as to shield at least the remaining light so as not to pass through the emission-side polarizing plate; at least the wavelength components of the primary colors of light among the light beams entering the viewing angle control element at least at the predetermined angle are shielded by the first light-shielding layer and the auxiliary light-shielding layer.