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公开(公告)号：US11462193B2
公开(公告)日：2022-10-04
申请号：US17390168
申请日：2021-07-30
申请人： ReaID Spark, LLC
摘要： A control system for a switchable privacy display apparatus comprises an ambient light sensor and a display luminance controller arranged to control the luminance of the display in response to measured illuminance. High image visibility is provided for public mode operation while in privacy mode visual security level above a perceived privacy threshold may be obtained by means of control of image luminance, in response to the output of the ambient light sensor.
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公开(公告)号：US11287677B2
公开(公告)日：2022-03-29
申请号：US16713544
申请日：2019-12-13
申请人： ReaID Spark, LLC
摘要： A display apparatus comprises at least one spatial light modulator and at least one curved view angle control element that comprises plural retarders arranged between the display polariser of each spatial light modulator, and an additional polariser. The curvature of the view angle control element provides increased luminance uniformity for a head-on user and increased visual security to an off-axis snooper.
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公开(公告)号：US11162661B2
公开(公告)日：2021-11-02
申请号：US17060476
申请日：2020-10-01
申请人： ReaID Spark, LLC
IPC分类号： H01L25/075 , F21V7/00 , F21V3/00 , F21V9/30 , F21Y115/10
摘要： An illumination apparatus comprises a first substrate; an optical structure; an array of light emitting elements disposed between the first substrate and the optical structure and an array of passive optical nanostructures disposed between the first substrate and the optical structure. Each of the passive optical nanostructures are disposed on a respective one of the light emitting elements and each passive optical nanostructure comprises an air gap. Each passive optical nanostructure is disposed between its respective light emitting element and the optical structure, wherein each passive optical nanostructure is configured to receive light emitted by its respective light emitting element, pass the received light, and output the pass light towards the optical structure.
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公开(公告)号：US11287562B2
公开(公告)日：2022-03-29
申请号：US17178936
申请日：2021-02-18
申请人： ReaID Spark, LLC
摘要： An illumination apparatus comprises a first substrate, an optical structure, an array of light emitting elements disposed on the first substrate and between the first substrate and the optical structure, and a mask comprising a plurality of apertures therein. The optical structure is configured to receive light emitted by the array of light emitting elements, direct the received light into a direction away from the first substrate, direct at least some of the light which has been directed away from the first substrate back towards the first substrate, and direct at least some of the light which has been directed back towards the first substrate through the plurality of apertures of the mask.
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公开(公告)号：US10712582B2
公开(公告)日：2020-07-14
申请号：US15991746
申请日：2018-05-29
申请人： ReaID Spark, LLC
发明人： Jonathan Harrold , Michael G. Robinson , Graham J. Woodgate , Miller H. Schuck , Adrian J. Hill
IPC分类号： G02B30/26 , H04N13/32 , H04N13/368 , H04N13/371 , H04N13/373 , H04N13/376 , H04N13/378 , H04N13/38 , F21V8/00 , G02B30/00 , H04N13/356 , H04N13/30
摘要： Disclosed is a light guiding valve apparatus including an imaging directional backlight, an illuminator array and an observer tracking system arranged to achieve control of an array of illuminators which may provide a directional display to an observer over a wide lateral and longitudinal viewing range, wherein the number of optical windows presented to the observer as viewing windows is controlled dependent on the lateral and longitudinal position or speed of an observer.
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公开(公告)号：US10359560B2
公开(公告)日：2019-07-23
申请号：US15097750
申请日：2016-04-13
申请人： ReaID Spark, LLC
摘要： An imaging directional backlight apparatus including a waveguide, a light source array, for providing large area directed illumination from localized light sources. The waveguide may include a stepped structure, in which the steps may further include extraction features optically hidden to guided light, propagating in a first forward direction. Returning light propagating in a second backward direction may be refracted, diffracted, or reflected by the features to provide discrete illumination beams exiting from the top surface of the waveguide. Viewing windows are formed through imaging individual light sources and hence defines the relative positions of system elements and ray paths. Lateral non-uniformities of output image are improved by means of adjustment of input aperture shape and reflective aperture shape. Cross talk in autostereoscopic and privacy displays may further be improved by light blocking layers arranged on the input end of the waveguide.
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