Sunlight collecting device and liquid crystal display using sunlight as a backlight source

A sunlight collecting device, comprising:

• a lens substrate having a plurality of circular openings;
• a plurality of Fresnel lenses corresponding to the circular openings and disposed on the lens substrate, the Fresnel lenses having an identical focal length for focusing the sunlight;
• a connector substrate disposed parallel to the lens substrate and away from the lens substrate with the focal length;
• a plurality of optical fiber connectors adjustably disposed on the connector substrate for making the focused sunlight be coupled into the optical fiber;
• and
• a light-tracking substrate disposed between the lens substrate and the connector substrate, the light-tracking substrate having a plurality of hollow openings such that the focused sunlight can pass through the light-tracking substrate, the light-tracking substrate utilized to simultaneously rotate the lens substrate and the connector substrate such that the Fresnel lenses are directly opposite to the sunlight.

An LCD using sunlight as a backlight source, comprising a display panel and a backlight module providing uniform light for the display panel, the LCD further comprising:

• a sunlight collecting device, which is coupled to the backlight module via an optical fiber, utilized to provide the backlight source for the backlight module, the sunlight collecting device comprising:
• a lens substrate having a plurality of circular openings;
• a plurality of Fresnel lenses corresponding to the circular openings and disposed on the lens substrate, the Fresnel lenses having an identical focal length for focusing the sunlight;
• a connector substrate disposed parallel to the lens substrate and away from the lens substrate with the focal length;
• a plurality of optical fiber connectors adjustably disposed on the connector substrate for making the focused sunlight be coupled into the optical fiber;
• and
• a light-tracking substrate disposed between the lens substrate and the connector substrate, the light-tracking substrate having a plurality of hollow openings such that the focused sunlight can pass through the light-tracking substrate, the light-tracking substrate utilized to simultaneously rotate the lens substrate and the connector substrate such that the Fresnel lenses are directly opposite to the sunlight.