| US 7,554,752 B2 | ||
| Lighting equipment | ||
| Satoshi Tamaoki, Miyagi (Japan); Hirao Ohta, Miyagi (Japan); and Akihisa Minato, Miyagi (Japan) | ||
| Assigned to Labosphere Institute, (Japan) | ||
| Filed on Jun. 18, 2007, as Appl. No. 11/764,386. | ||
| Application 11/764386 is a continuation of application No. 11/090810, filed on Mar. 25, 2005, granted, now 7,283,313. | ||
| Application 11/090810 is a continuation of application No. 10/048373, filed on Jan. 29, 2002, granted, now 6,961,190, filed on Nov. 01, 2005. | ||
| Claims priority of application No. P11-210762 (JP), filed on Jul. 26, 1999; application No. P11-218870 (JP), filed on Aug. 02, 1999; application No. P11-244920 (JP), filed on Aug. 31, 1999; application No. P11-257520 (JP), filed on Sep. 10, 1999; application No. P11-284446 (JP), filed on Oct. 05, 1999; application No. P2000-074206 (JP), filed on Mar. 16, 2000; application No. P2000-111794 (JP), filed on Apr. 13, 2000; application No. P2000-113454 (JP), filed on Apr. 14, 2000; and application No. P2000-145343 (JP), filed on May 17, 2000. | ||
| Prior Publication US 2008/0137333 A1, Jun. 12, 2008 | ||
| Int. Cl. G02B 17/00 (2006.01) | ||
| U.S. Cl. 359—726 [359/661; 359/664] | 19 Claims |
| 1. A lighting equipment comprising:
a plurality of light-emitting units, each of the light-emitting units comprising:
a light source, and
a bulk-shaped lens body identified by a top surface, a bottom surface and a contour surface, implementing a well-shaped concavity
in the inside of the lens body identified by a ceiling surface and a cylindrical sidewall portion in succession to the ceiling
surface, the concavity being aligned to the top surface from the bottom surface along an optical axis of the lens body so
as to install the light source, a distance between the ceiling surface of the concavity and the top surface along the optical
axis is larger than a radius of curvature of the top surface; and
a power supply unit connected respectively to the light-emitting units, configured to supply electric power to each of the
light sources,
wherein a gap is provided between the light source and the cylindrical sidewall portion.
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