Light-guiding device, light-guiding method and display apparatus for guiding light transmission

A display apparatus for displaying image, comprising:

• a backlight unit for providing a light source needed for image display;
• a display panel for displaying image by using light of the light source according to image data;
• and
• a light-guiding device located between the backlight unit and the display panel;
• a first transparent substrate having an incident surface and a transmission surface;
• a first parallax barrier located on the first transparent substrate and configured to allow a first type of light in the light source to be converged to a first assemblage point and allow a second type of light in the light source to be converged to a second assemblage point,
• wherein the first parallax barrier comprises a plurality of light-shielding units, each of which is produced by using a micro-electro-mechanical system switch, and comprises:
• a light-shielding body;
• an attraction cantilever connected with the light-shielding body, an attraction and a separation of the attraction cantilever being capable of forcing the light-shielding body to move so as to change transmission of the light in the light source.

A method for guiding transmission of light in a light source, comprising:

• disposing a first transparent substrate having an incident surface and a transmission surface;
• disposing a first parallax barrier on the first transparent substrate, the first parallax barrier comprising a plurality of light-shielding units, each of which is produced by using a micro-electro-mechanical system switch and comprises a light-shielding body and an attraction cantilever connected with the light-shielding body;
• and,
• controlling attraction and separation of the attraction cantilever to move the light-shielding body, so as to control a first type of light in the light source to be converged to a first assemblage point, and control a second type of light in the light source to be converged to a second assemblage point.