Patent ID: 9229252
Filing Date: 2016-01-05
CPC Classification: F21S,G02F,G09G

Claim Text:
1. A stereographic display apparatus comprising: a graphic display device having a light incoming surface, a normal line and a polarizer formed in a tabular shape, the polarizer having a polarizing direction, and the graphic display device being configured to show stereographic displays via the polarizer; a position sensor located adjacent to the graphic display device and being configured to detect an inclined angle in at least one direction with reference to the normal line of the graphic display device; an optical modulator having a first substrate, a second substrate, a first electrode, a second electrode, a liquid crystal layer, a sealing material and a prism array being formed in a tabular shape, the first substrate having an inner surface, an outer surface and an end portion being made from a transparent material, the outer surface of the first substrate being located on the polarizer of the graphic display device, the second substrate also having an inner surface, an outer surface and an end portion being made from a transparent material, and the second substrate being located such that each of the inner surfaces of the first substrate and the second substrate face each other through at least the liquid crystal layer, the prism array having a refraction index, an inner surface and an outer surface made from a transparent material, the outer surface of the prism array formed in a substantially plane shape, the inner surface of the prism array including a plurality of fine prisms, each of the fine prisms extending in a first direction, aligning in a second direction substantially perpendicular to the first direction and forming an inclined projection formation in a cross-sectional view from the first direction, the prism array being located adjacent the inner surface of the first substrate so that the outer surface of the prism array faces the inner surface of the first substrate, the first electrode having an inner surface being disposed on at least one of the inner surface of the first substrate and the inner surface of the prism array, and prescribing an initial orientation state of liquid crystal molecules disposed in the liquid crystal layer, the second electrode having an inner surface being disposed on the inner surface of the second substrate, the liquid crystal layer having a refraction index of extraordinary light and a refraction index of ordinary light of materials included in the liquid crystal layer, and being formed between the first substrate and the second substrate so as to cover each of the inner surfaces of the first electrode and the second electrode, and thereby defining a thickness of the liquid crystal layer, and the sealing material disposed between the end portion of the first substrate and the end portion of the second substrate and sealing the liquid crystal layer so as to prevent leakage of the liquid crystal in an outward direction of the optical modulator; and a voltage supply being configured to receive the inclined angle from the position sensor, wherein the voltage supply is configured to apply a voltage to the optical modulator in accordance with the inclined angle output from the position sensor during operation.