Manufacturing method of light-guiding apparatus for using in backlight of liquid crystal display
Due to lights with different wavelengths having different indexes of refraction in a liquid crystal, a retardation between lights with different wavelengths occurs and causes the problem of viewing angle of the liquid crystal display. The present invention provides a manufacturing method of light-guiding apparatus of a liquid crystal display to form light-guiding pillars having a characteristic of total reflection as a fiber. The light from back light module through the light-guiding pillars enters the liquid crystal at an incident angle smaller than 150 for reducing the retardation between lights with different wavelengths.
1. A manufacturing method of a light-guiding apparatus of a liquid crystal display, comprising:
sprinkling a plurality of micrometer-level particles as a mask on a substrate;
exposing a surface of said substrate with a UV light, wherein said surface has said plurality of micrometer-level particles thereon; and
removing said plurality of micrometer-level particles and developing-said substrate to remove the exposed portion of said surface for forming a plurality of light-guiding pillars.
2. The manufacturing method of claim 1 , wherein said substrate is made of polymer.
3. The manufacturing method of claim 1 , wherein said plurality of light-guiding pillars are assembled in a twisted nematic liquid crystal display.
4. The manufacturing method of claim 1 , wherein said plurality of light-guiding pillars are made of silicon.
5. The manufacturing method of claim 1 , wherein said manufacturing method further comprises employing a diffuser layer in the outside of a color filter glass substrate of said liquid crystal display.
6. The manufacturing method of claim 1 , wherein said plurality of micrometer-level particles are spherical.
7. The manufacturing method of claim 1 , wherein an incident light entering said plurality of light-guiding pillars occurs total reflection on the inner peripheral of light-guiding pillars.
8. The manufacturing method of claim 1 , wherein said surface of said substrate fills with said plurality of micrometer-level particles and said plurality of micrometer-level particles do not overlay with each other.
9. The manufacturing method of claim 1 , wherein said substrate is a single material.