Display and detection system

Abstract

A display and detection system including an image sensor, a display screen and an antireflection system covering the display screen and the image sensor, such an antireflection system including an electrically-controllable rectilinear polarizer.

What is claimed is: 
     
         1 . A display and detection system comprising:
 an image sensor;   a display screen;   an antireflection system covering the display screen and the image sensor, the antireflection system comprising an electrically-controllable rectilinear polarizer; and   means for deactivating the electrically-controllable rectilinear polarizer on each use of the image sensor.   
     
     
         2 . The display and detection system of  claim 1 , wherein the antireflection system further comprises a quarter-wave plate. 
     
     
         3 . The display and detection system of  claim 1 , wherein the electrically-controllable rectilinear polarizer is a liquid crystal polarizer. 
     
     
         4 . The display and detection system of  claim 1 , wherein the display screen covers the image sensor. 
     
     
         5 . The display and detection system of  claim 1 , wherein the display screen comprises a light-emitting layer and an encapsulation layer covering the light emitting layer. 
     
     
         6 . The display and detection system of  claim 5 , wherein the light-emitting layer is an OLED-type layer. 
     
     
         7 . The display and detection system of  claim 5 , wherein the display screen comprises a transparent substrate having the light-emitting layer resting thereon. 
     
     
         8 . The display and detection system of  claim 1 , wherein the antireflection system is covered with a transparent coating. 
     
     
         9 . The display and detection system of  claim 8 , wherein the transparent coating is made of glass. 
     
     
         10 . The display and detection system of  claim 1 , wherein the image sensor comprises an array of organic sensors. 
     
     
         11 . The display and detection system of  claim 1 , further comprising an angular filter, between the image sensor and the display screen, capable of blocking incident rays having an incidence relative to a direction orthogonal to a surface of the angular filter greater than a threshold and of letting through at least certain incident rays having an incidence relative to a direction orthogonal to the surface smaller than the threshold. 
     
     
         12 . The display and detection system of  claim 11 , wherein the system detects at least one fingerprint of a user. 
     
     
         13 . The display and detection system of  claim 12 , wherein the image sensor comprises a touch surface for a finger of the user. 
     
     
         14 . A display and detection system comprising:
 an image sensor;   a display screen;   an antireflection system covering the display screen and the image sensor, the antireflection system comprising an electrically-controllable rectilinear polarizer; and   a circuit for deactivating the electrically-controllable rectilinear polarizer on each use of the image sensor.   
     
     
         15 . The display and detection system of  claim 14 , wherein the circuit comprises a switch. 
     
     
         16 . The display and detection system of  claim 15 , wherein the switch opens or closes to apply or not to apply an electric field to the electrically-controllable rectilinear polarizer.