Secure computer display using inverse computational light field displays
View Patent ↗A system and method to secure information displayed on the screen of a computing device is provided in which an image to be displayed is algorithmically distorted and thereafter displayed on a display device. To properly view the image, a user must use decoding eyewear which will correct for the applied distortion. The displayed image is thereby rendered unviewable to casual observers and passers-by.
1. A system for displaying output of a computer system comprising:
a processor;
a set of decoding eyewear that comprises a wearable item having one or more corrective lenses that provide an optical correction function;
a light field display device;
a computer-readable medium containing programming instructions that are configured to cause the processor to:
receive an image to be displayed on the light field display device,
identify one or more parameters for the set of decoding eyewear by:
receiving, via a user interface, an identification of the set of decoding eyewear; and
accessing a data storage facility and retrieving the one or more parameters for the set of decoding eyewear, or retrieving a rule set that contains the one or more parameters for the set of decoding eyewear;
use the one or more parameters to generate a light field that yields a distorted image such that the distorted image will appear, when displayed on the light field display device:
in a distorted and unreadable state to a user having aberration-free vision or normally corrected vision; and
in an undistorted and readable state to a user who is using the set of decoding eyewear; and
cause the light field display device to output the light field and received image to yield the distorted image.
2. The system of claim 1 wherein the light field display device comprises:
a 2D display device having a first plane; and
a parallax barrier, mounted on the 2D display and providing a second plane over the first plane.
3. The system of claim 2 wherein the parallax barrier comprises:
a mask having an array of pinholes defined therein; and
a spacer that separates the mask from the 2D display.
4. The system of claim 3 wherein the pinholes are approximately 75 microns in diameter and are regularly spaced approximately 390 microns apart.
5. The system of claim 3 wherein said spacer is acrylic.
6. A method of providing a secure display comprising:
by a processing device:
receiving an image to be displayed;
identifying one or more parameters for a set of decoding eyewear, wherein the set of decoding eyewear comprises a wearable item having one or more corrective lenses that provide an optical correction function, and wherein identifying the one or more parameters comprises:
receiving, via a user interface, an identification of the set of decoding eyewear; and
accessing a data storage facility and retrieving the one or more parameters for the set of decoding eyewear, or retrieving a rule set that contains the one or more parameters for the set of decoding eyewear;
using the one or more parameters to generate a light field that will yield a distorted image such that the distorted image will appear:
in a distorted and unreadable state to a user having aberration-free vision or normally corrected vision, and
in an undistorted and readable state to a user who is using the set of decoding eyewear; and
by a light field display device, using the light field to display the distorted image.
7. The method of claim 6 wherein the light field display device comprises:
a 2D display device having a first plane; and
a parallax barrier, mounted on the 2D display device and providing a second plane over the first plane.
8. The method of claim 7 wherein the parallax barrier comprises:
a mask having an array of pinholes defined therein; and
a spacer that separates the mask from the 2D display device.
9. The method of claim 8 wherein the pinholes are approximately 75 microns in diameter and are regularly spaced approximately 390 microns apart.
10. The method of claim 8 wherein the spacer is acrylic.
11. The method of claim 6 , further comprising:
identifying one or more parameters of the light field display device; and
when generating the light field, also using the one or more parameters to of the light field display device.