Virtual reality display device based on phase change materials

A virtual reality display device based on phase change materials, characterized by comprising from bottom to top:

• a backlight source, a pixelated anti-reflection layer, an all-dielectric phase change filter structure, a metal absorbing layer and an optical lens;
• wherein the all-dielectric phase change filter structure is located above the pixelated anti-reflection layer and comprises an upper dielectric multilayer film, a phase change intermediate cavity layer and a lower dielectric multilayer film, which is used to filter out a light of a specific wavelength consistent with a VR display and provide a higher color accuracy;
• the optical lens is located behind the phase-change filter structure and is used for focusing a treated light;
• a structure of the upper dielectric multilayer film and the lower dielectric multilayer film is H (LH) x, where H is a film layer of high refractive index and low extinction coefficient, L is a film layer of low refractive index and low extinction coefficient, X is the number of periods of a film layer group, X≥1, and an optical thickness of each film layer is one quarter of a wavelength used;
• the virtual reality display device further comprises a quantum dot excitation layer, which is located above the backlight source and below the pixelated anti-reflection layer, and is used to receive and excite a background light generated by the backlight source;
• and
• wherein the all-dielectric phase change filter structure further comprises an all-dielectric intermediate cavity, the all-dielectric intermediate cavity is in middle of the upper dielectric multilayer film and the lower dielectric multilayer film and is distributed on an upper and/or a lower side of the phase change intermediate cavity, and a thickness is one half of an optical thickness of a transmitted light.