| US 7,542,101 B2 | ||
| Dioptric element array substrate, image display device and image display apparatus | ||
| Yasuhiro Kume, Kawachinagano (Japan); Noriaki Ohnishi, Nara (Japan); and Naoko Mizusaki, Tenri (Japan) | ||
| Assigned to Sharp Kabushiki Kaisha, Osaka (Japan) | ||
| Filed on Sep. 24, 2004, as Appl. No. 10/949,449. | ||
| Claims priority of application No. 2003-335246 (JP), filed on Sep. 26, 2003. | ||
| Prior Publication US 2005/0068475 A1, Mar. 31, 2005 | ||
| Int. Cl. G02F 1/1335 (2006.01) | ||
| U.S. Cl. 349—5 [349/95; 349/146; 359/624] | 16 Claims |
| 1. A dioptric element array substrate comprising:
a first dioptric element array having a plurality of first dioptric elements arranged two-dimensionally;
a second dioptric element array having a plurality of second dioptric elements and comprising a first material having a first
refractive index, the array being two-dimensionally in one-to-one correspondence with the plurality of first dioptric elements;
and
a third dioptric element array having a plurality of third dioptric elements and comprising a second material having a second
refractive index different from the first refractive index, the second material being contiguous with a surface of the first
material, each of the plurality of third dioptric elements is provided adjacent with each other between two second dioptric
elements and has a concaved face functioning as a concave lens for a light ray incident from a side of the second dioptric
element array,
wherein principal rays of beams incident on the first dioptric element array at angles different from each other and converged
with the first dioptric element array are collimated with the second dioptric element array and the third dioptric element
array.
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