US 11,726,346 B2
Focus tunable optical system and multi-focal display device
Hector Navarro Fructuoso, Munich (DE); Atanas Boev, Munich (DE); Panji Setiawan, Munich (DE); and Onay Urfalioglu, Munich (DE)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Aug. 30, 2021, as Appl. No. 17/461,501.
Application 17/461,501 is a continuation of application No. 16/844,841, filed on Apr. 9, 2020, granted, now 11,106,052.
Application 16/844,841 is a continuation of application No. PCT/EP2017/075697, filed on Oct. 9, 2017.
Prior Publication US 2021/0389603 A1, Dec. 16, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 27/00 (2006.01); G02B 30/40 (2020.01); H04N 13/167 (2018.01); H04N 13/144 (2018.01); H04N 13/351 (2018.01); H04N 13/398 (2018.01); G02B 7/06 (2021.01)
CPC G02B 30/40 (2020.01) [G02B 7/06 (2013.01); H04N 13/144 (2018.05); H04N 13/167 (2018.05); H04N 13/351 (2018.05); H04N 13/398 (2018.05)] 11 Claims
OG exemplary drawing
 
1. A focus tunable optical system, comprising:
a compound lens comprising a plurality of focus tunable lenses, each of the focus tunable lenses having an optical response with an oscillation artifact; and
a controller configured to shift a focus of the compound lens from a first focal plane to a second focal plane by applying control signals to the plurality of focus tunable lenses,
wherein applying the control signals comprises applying to each of the focus tunable lenses a respective control signal, the respective control signal having a first value for the first focal plane and a second value for the second focal plane, wherein the controller is configured to apply the control signals to the plurality of focus tunable lenses in a time-shifted manner, so that the applied control signals are time-shifted relative to each other.