Optical stack for directional display
MG Robinson, GJ Woodgate, RA Ramsey… - US Patent …, 2022 - Google Patents
A privacy display comprises a spatial light modulator and a passive retarder arranged
between first and second polarisers arranged in series with the spatial light modulator. On …
between first and second polarisers arranged in series with the spatial light modulator. On …
Reflective optical stack for privacy display
MG Robinson, GJ Woodgate, J Harrold… - US Patent …, 2021 - Google Patents
A privacy display comprises a polarised output spatial light modulator, reflective polariser,
plural polar control retarders and a polariser. In a privacy mode of operation, on-axis light …
plural polar control retarders and a polariser. In a privacy mode of operation, on-axis light …
Optical stack for switchable directional display
MG Robinson, GJ Woodgate, RA Ramsey… - US Patent …, 2021 - Google Patents
(57) ABSTRACT A privacy display comprises a spatial light modulator and a compensated
switchable liquid crystal retarder arranged between first and second polarisers arranged in …
switchable liquid crystal retarder arranged between first and second polarisers arranged in …
Optical waveguide for directional backlight
GJ Woodgate, MG Robinson - US Patent 10,935,714, 2021 - Google Patents
A switchable directional backlight for a privacy display comprises a waveguide with first and
second opposing input ends and a turning film arranged to collect light output from the …
second opposing input ends and a turning film arranged to collect light output from the …
Privacy display apparatus
GJ Woodgate, J Harrold, MG Robinson… - US Patent …, 2021 - Google Patents
2018-12-05 Assigned to JEFFERIES FINANCE LLC, AS COLLATERAL AGENT
reassignment JEFFERIES FINANCE LLC, AS COLLATERAL AGENT SECURITY INTEREST …
reassignment JEFFERIES FINANCE LLC, AS COLLATERAL AGENT SECURITY INTEREST …
Optical stack for switchable directional display
MG Robinson, GJ Woodgate, RA Ramsey… - US Patent …, 2021 - Google Patents
A privacy display comprises a spatial light modulator and a compensated switchable liquid
crystal retarder arranged between first and second polarisers arranged in series with the …
crystal retarder arranged between first and second polarisers arranged in series with the …
Wide angle imaging directional backlights
J Harrold, GJ Woodgate - US Patent 11,079,619, 2021 - Google Patents
An imaging directional backlight apparatus includes a waveguide and a light source array,
providing large area directed illumination from localized light sources. The waveguide may …
providing large area directed illumination from localized light sources. The waveguide may …
Reflective optical stack for privacy display
MG Robinson, GJ Woodgate, J Harrold… - US Patent …, 2020 - Google Patents
A privacy display comprises a polarised output spatial light modulator, reflective polariser,
plural polar control retarders and a polariser. In a privacy mode of operation, on-axis light …
plural polar control retarders and a polariser. In a privacy mode of operation, on-axis light …
Directional display apparatus
MG Robinson, GJ Woodgate, B Ihas - US Patent 11,092,852, 2021 - Google Patents
A switchable privacy display comprises a spatial light modulator, and switchable liquid
crystal retarder arranged between crossed quarter-wave plates and polarisers. In a privacy …
crystal retarder arranged between crossed quarter-wave plates and polarisers. In a privacy …
Backlights having stacked waveguide and optical components with different coefficients of friction
B Ihas, RA Ramsey, GJ Woodgate… - US Patent 10,948,648, 2021 - Google Patents
A backlight includes a directional waveguide and a light source array, for providing large
area directed illumination from localized light sources. Interfaces are provided between the …
area directed illumination from localized light sources. Interfaces are provided between the …