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 |
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.
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