Light guide apparatus, a backlight apparatus and a liquid crystal display apparatus

A backlight apparatus comprising:

• a wedge-type light guide having a refractive index n1, and having a top surface, a bottom surface and a side surface;
• a light source for directing light to said side surface of said wedge-type light guide;
• a light transmission layer having a refractive index n2, which is smaller than said refractive index n1, and having a top surface and a bottom surface, wherein said bottom surface of said light transmission layer is attached to said top surface of said wedge-type light guide;
• and
• a plurality of prisms attached on said top surface of said light transmission layer for directing the incident light from said light transmission layer toward a light path along a direction of a normal line of said top surface of said light transmission layer.

A backlight apparatus comprising:

• a wedge-type light guide having a refractive index n1, and having a top surface, a bottom surface and a side surface;
• a light source for directing light to said side surface of said wedge-type light guide;
• a first light transmission layer having a refractive index n2, which is smaller than said refractive index n1, and having a top surface and a bottom surface, wherein said top surface of said first light transmission layer is attached to said bottom surface of said wedge-type light guide;
• and
• a light deflecting layer having a top surface attached to said bottom surface of said first light transmission layer for separating colors of the incident light from said first light transmission layer and for directing the light of said separated colors toward said top surface of said wedge-type light guide.

A liquid crystal display (LCD) apparatus comprising:

• an LCD panel including an upper transparent substrate, a lower transparent substrate, and a liquid crystal material filled between said upper transparent substrate and said lower transparent substrate;
• a light diffusing layer adjacent to said upper transparent substrate;
• and
• a backlight apparatus adjacent to said lower transparent substrate, wherein said backlight apparatus comprises:
• a wedge-type light guide having a refractive index n1, and having a top surface, a bottom surface and a side surface;
• a light source for directing light to said side surface of said wedge-type light guide;
• a first light transmission layer having a refractive index n2, which is smaller than said refractive index n1, and having a top surface and a bottom surface, wherein said top surface of said first light transmission layer is attached to said bottom surface of said wedge-type light guide;
• and
• a light deflecting layer having a top surface attached to said bottom surface of said first light transmission layer for deflecting the incident light from said first light transmission layer toward said LCD panel through said top surface of said wedge-type light guide.

A liquid crystal display (LCD) apparatus comprising:

• an LCD panel including an upper transparent substrate, a lower transparent substrate, and a liquid crystal material filled between said upper transparent substrate and said lower transparent substrate;
• a light diffusing layer adjacent to said upper transparent substrate;
• and
• a backlight apparatus adjacent to said lower transparent substrate, wherein said backlight apparatus comprises:
• a wedge-type light guide having a refractive index n1, and having a top surface, a bottom surface and a side surface;
• a light source for directing light to said side surface of said wedge-type light guide;
• a light transmission layer having a refractive index n2, which is smaller than said refractive index n1, and having a top surface and a bottom surface, wherein said bottom surface of said light transmission layer is attached to said top surface of said wedge-type light guide;
• and
• a plurality of prisms attached on said top surface of said light transmission layer for directing the incident light from said light transmission layer toward a light path along a direction of a normal line of said top surface of said light transmission layer.

A liquid crystal display (LCD) apparatus comprising:

• an LCD panel including an upper transparent substrate, a lower transparent substrate, and a liquid crystal material filled between said upper transparent substrate and said lower transparent substrate;
• a light diffusing layer adjacent to said upper transparent substrate;
• and
• a backlight apparatus adjacent to said lower transparent substrate, wherein said backlight apparatus comprises:
• a wedge-type light guide having a refractive index n1, and having a top surface, a bottom surface and a side surface;
• a light source for directing light to said side surface of said wedge-type light guide;
• a first light transmission layer having a refractive index n2, which is smaller than said refractive index n1, and having a top surface and a bottom surface, wherein said top surface of said first light transmission layer is attached to said bottom surface of said wedge-type light guide;
• and
• a light deflecting layer having a top surface attached to said bottom surface of said first light transmission layer for separating colors of the incident light from said first light transmission layer and for directing the light of said separated colors toward said LCD panel through said top surface of said wedge-type light guide.

A light guide apparatus comprising:

• a wedge-type light guide having a refractive index n1, and having a top surface, a bottom surface and a side surface;
• a light transmission layer having a refractive index n2, which is smaller than said refractive index n1, and having a top surface and a bottom surface, wherein said top surface of said light transmission layer is attached to said bottom surface of said wedge-type light guide;
• and
• a light deflecting layer having a top surface attached to said bottom surface of said light transmission layer for deflecting the incident light from said light transmission layer toward said top surface of said wedge-type light guide.

A light guide apparatus comprising:

• a wedge-type light guide having a refractive index n1I, and having a top surface, a bottom surface and a side surface;
• a light transmission layer having a refractive index n2, which is smaller than said refractive index n1, and having a top surface and a bottom surface, wherein said bottom surface of said light transmission layer is attached to said top surface of said wedge-type light guide;
• and
• a plurality of prisms attached on said top surface of said light transmission layer for directing the incident light from said light transmission layer toward a light path along a direction of a normal line of said top surface of said light transmission layer.

A light guide apparatus comprising:

• a wedge-type light guide having a refractive index n1, and having a top surface, a bottom surface and a side surface;
• a light transmission layer having a refractive index n2, which is smaller than said refractive index n1, and having a top surface and a bottom surface, wherein said top surface of said light transmission layer is attached to said bottom surface of said wedge-type light guide;
• and
• a light deflecting layer having a top surface attached to said bottom surface of said light transmission layer for separating colors of the incident light from said light transmission layer and for directing the light of said separated colors toward said top surface of said wedge-type light guide.