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; and
an antireflection system covering the display screen and the image sensor, the antireflection system comprising an electrically-controllable rectilinear polarizer;
wherein the electrically controllable rectilinear polarizer can be deactivated prior to 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 1 , 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 method for using a display and detection system, the method comprising:
providing the system with an image sensor, a display screen, and an antireflection system covering the display screen and the image sensor, the antireflection system including an electrically-controllable rectilinear polarizer;
deactivating the electrically controllable rectilinear polarizer; and
detecting at least one fingerprint of a user with the image sensor.
15. A method for controlling a display and detection system comprising an image sensor, a display screen, and an antireflection system covering the display screen and the image sensor, the antireflection system including an electrically-controllable rectilinear polarizer, the method comprising:
deactivating the electrically controllable rectilinear polarizer on each use of the image sensor.