US 11,747,646 B2
Directional OLED display
Steen Svendstorp Krener-Iversen, København K (DK); Michael Rasmussen, København K (DK); Peter Allan Simonsen, København K (DK); and Morten Corell, København K (DK)
Assigned to Realfiction Lab ApS, København K (DK)
Appl. No. 17/439,033
Filed by Realfiction Lab ApS, København K (DK)
PCT Filed Mar. 16, 2020, PCT No. PCT/EP2020/057072
§ 371(c)(1), (2) Date Sep. 14, 2021,
PCT Pub. No. WO2020/187828, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 19163290 (EP), filed on Mar. 15, 2019; application No. 19177726 (EP), filed on May 31, 2019; and application No. 19205469 (EP), filed on Oct. 25, 2019.
Prior Publication US 2022/0155613 A1, May 19, 2022
Int. Cl. G02B 30/33 (2020.01); G02B 3/00 (2006.01); G06F 3/01 (2006.01); G09G 3/3208 (2016.01)
CPC G02B 30/33 (2020.01) [G02B 3/0056 (2013.01); G06F 3/013 (2013.01); G09G 3/3208 (2013.01); G09G 2330/021 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A display for directional control of an image to an observer, said display comprising:
a plurality of image pixels arranged in a first segment covering an area of said display,
each image pixel defining an area having a plurality of subpixels,
each subpixel being optically addressable and comprising:
a thin film stack of an electroluminescent layer and a photo sensitive layer,
said electroluminescent layer and said photo sensitive layer constituting an optical converter such that light incident on a respective subpixel leads to generation of a first current through said photo sensitive layer and through said electroluminescent layer such that said electroluminescent layer emits light from the position of said respective subpixel within said image pixel when a voltage being applied across said thin film stack,
said display comprising:
an addressing light element having a plurality of addressing pixels for emitting light from a respective addressing pixel to said first segment and optically addressing the subpixels of said segment,
said plurality of addressing pixels comprising at least a respective first addressing pixel defining a first direction from said first segment towards said viewpoint, and a respective second addressing pixel defining a second direction from said first segment towards a second viewpoint,
said first direction being different from said second direction,
an optical arrangement between said addressing light element and said optical converter, said optical arrangement having an optical power,
a front optical arrangement, said front optical arrangement having an optical power and a first focal point substantially at said optical converter, and a second focal point between said front optical arrangement and a point in front of and infinitely far away from said front optical arrangement,
a controller for addressing a respective addressing pixel for emitting light from said respective addressing pixel,
said optical arrangement adapted for directing the light from said respective addressing pixel to the subpixels of said segment such that the subpixels of said first segment emits light visible from said viewpoint.