US 12,169,339 B2
Touch screen for privacy display
Jonathan Harrold, Leamington Spa (GB); and Graham J. Woodgate, Henley-on-Thames (GB)
Assigned to RealD Spark, LLC, Boulder, CO (US)
Filed by RealD Spark, LLC, Beverly Hills, CA (US)
Filed on Nov. 18, 2021, as Appl. No. 17/529,782.
Application 17/529,782 is a continuation of application No. 17/018,420, filed on Sep. 11, 2020, granted, now 11,187,945.
Application 17/018,420 is a continuation of application No. 16/256,754, filed on Jan. 24, 2019, granted, now 10,802,356, issued on Oct. 13, 2020.
Claims priority of provisional application 62/699,906, filed on Jul. 18, 2018.
Claims priority of provisional application 62/691,896, filed on Jun. 29, 2018.
Claims priority of provisional application 62/673,576, filed on May 18, 2018.
Claims priority of provisional application 62/622,001, filed on Jan. 25, 2018.
Prior Publication US 2022/0146868 A1, May 12, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02F 1/13 (2006.01); G02F 1/1333 (2006.01); G02F 1/1335 (2006.01); G02F 1/13363 (2006.01); G02F 1/1343 (2006.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G02F 1/13439 (2013.01) [G02F 1/1323 (2013.01); G02F 1/13338 (2013.01); G02F 1/133536 (2013.01); G02F 1/13363 (2013.01); G06F 3/0412 (2013.01); G06F 3/0416 (2013.01); G06F 3/044 (2013.01); G02F 1/133531 (2021.01); G02F 1/133634 (2013.01); G02F 2413/01 (2013.01); G02F 2413/02 (2013.01); G02F 2413/05 (2013.01); G02F 2413/06 (2013.01); G02F 2413/08 (2013.01); G06F 2203/04107 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A touch input display device comprising:
a spatial light modulator (SLM) arranged to output light;
a display polariser arranged on the output side of the SLM, wherein the display polariser is a linear polariser;
an additional polariser arranged on the output side of the display polariser wherein the additional polariser is a linear polariser;
a switchable liquid crystal retarder comprising a layer of liquid crystal material arranged between the display polariser and the additional polariser;
switchable retarder control electrodes arranged to apply a voltage for controlling the state of the switchable liquid crystal retarder;
at least one passive retarder arranged between the display polariser and the additional polariser; and
at least one touch electrode array arranged in a layer on the output side of the switchable retarder control electrodes.