Patent ID: 11927343
Assignee: nan
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  G  H | IPC F  H

Claim 6:
7. A controllable light beam device comprising:
a light source having primary optics producing a low divergence light beam;
a liquid crystal device with an electrically variable refractive index distribution arranged to receive said light beam and to provide a variable angle beam; and
a tunable color filter arranged to receive said light beam,
wherein a CCT variation in said variable angle beam in the range of about 0 degrees and about 10 degrees of viewing angle between substantially no beam broadening by said liquid crystal device and providing about 15 additional degrees of beam broadening by said liquid crystal device is less than about 10% of a CCT of said light beam at about 0 degrees of viewing angle by using said tunable color filter to adjust a CCT of said variable angle beam.