Microlens array sheet for a liquid crystal display, method for a

Details Microlens array sheet for a liquid crystal display, method for a Microlens array sheet for a liquid crystal display, method for a

1994-08-24

1996-09-10

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 94, 359 67, G02F 11335, G02F 11333, G02F 113

Patent

active

055554768

ABSTRACT:
Disclosed is a microlens array sheet for a liquid crystal display including a first substance layer and a second substance layer having a refractive index less than that of the first substance layer. A plurality of minute unit lenses are formed by providing concaves and/or convexes to an interface between the first and second substance layers. When a ray having entered into the sheet from the normal-line direction of the second substance layer exits from the surface of the first substance layer, an refractive angle relative to the normal line of the surface of first substance layer is not less than 30 degrees. When this microlens array sheet is attached to the surface of a liquid crystal cell of a liquid crystal display, an improved large angle of visibility can be obtained.

REFERENCES:
patent: 5151801 (1992-09-01), Hiroshima

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