Liquid crystal display apparatus and fabricating method thereof, back light and fabricating method thereof

A back light for a liquid crystal display panel, comprising:

• one or more light sources;
• an anisotropic grating including a plurality of barriers and a plurality of slits arranged alternately;
• wherein the anisotropic grating is configured to separate incident light into light of a first color, light of a second color, and light of a third color, and configured to emit the light of the first color, the light of the second color, and the light of the third color at different exit angles, respectively;
• and
• the anisotropic grating comprises an anisotropic optical material in the plurality of slits, the anisotropic optical material has a first refractive index for a transverse magnetic component of the incident light and a second refractive index for a transverse electric component of the incident light, the first refractive index being different from the second refractive index.

A method of fabricating a liquid crystal display apparatus, comprising:

• forming a liquid crystal layer on a base substrate;
• and
• forming an anisotropic grating on a side of the liquid crystal layer distal to the base substrate and comprising a plurality of barriers and a plurality of slits arranged alternately, the anisotropic grating is configured to separate incident light into light of a first color, light of a second color, and light of a third color, and configured to emit the light of the first color, the light of the second color, and the light of the third color at different exit angles, respectively;
• wherein the anisotropic grating is formed to comprise an anisotropic optical material in the plurality of slits, the anisotropic optical material has a first refractive index for a transverse magnetic component of the incident light and a second refractive index for a transverse electric component of the incident light, the first refractive index being different from the second refractive index.

A method of fabricating a back light for a liquid crystal display panel, comprising forming an anisotropic grating;

• wherein forming the anisotropic grating comprises forming a plurality of barriers and a plurality of slits arranged alternately;
• the anisotropic grating is formed to separate incident light into light of a first color, light of a second color, and light of a third color, and formed to emit the light of the first color, the light of the second color, and the light of the third color at different exit angles, respectively;
• and
• the anisotropic grating is formed to include an anisotropic optical material in the plurality of slits, the anisotropic optical material has a first refractive index for a transverse magnetic component of the incident light and a second refractive index for a transverse electric component of the incident light, the first refractive index being different from the second refractive index.