DISPLAY AND DETECTION SYSTEM
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.
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.