VISION CORRECTING DISPLAY WITH ABERRATION COMPENSATION USING INVERSE BLURRING AND A LIGHT FIELD DISPLAY

• US 20160042501A1
• Filed: 08/11/2015
• Published: 02/11/2016
• Est. Priority Date: 08/11/2014
• Status: Active Grant

• Current Assignee: Massachusetts Institute of Technology
• Original Assignee: Regents of the University of California (University of California)
• Inventors: Wetzstein, Gordon, Raskar, Ramesh, Huang, Fu-Chung, Barsky, Brian
• Granted Patent: US 10,529,059 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02B 27/0025 for optical correction, e.g. distorsion, aberration
• CPC Class Codes: G02B 27/0075 with means for altering, e.g. increasing, the depth of field or depth of focus
• CPC Class Codes: G02B 30/27 involving lenticular arrays
• CPC Class Codes: G06T 2207/20172 Image enhancement details
• CPC Class Codes: G06T 2210/36 Level of detail
• CPC Class Codes: G06T 2210/41 Medical
• CPC Class Codes: G06T 5/73 Deblurring; Sharpening

Abstract

Systems and methods for compensating for at least one optical aberration in a vision system of a viewer viewing a display. Image data for an image to be displayed is received, at least one parameter related to at least one optical aberration in the vision system of a viewer is received and an aberration compensated image to be displayed is computed based on the at least one received parameter related to the vision system of a viewer and on at least one characteristic of the light field element. The aberration compensated image is displayed on the display medium, such that when a viewer whose vision system has the at least one optical aberration views the aberration compensated image displayed on the display medium through a light field element, the aberration compensated image appears to the viewer with the at least one aberration reduced or eliminated.

Claims

1. A display device that compensates for at least one optical aberration in a vision system of a viewer viewing a display, the display device comprising:

a display medium comprising an array of pixels;

a light field element; and

a processor element that;

receives image data for an image to be displayed the image data including pixel values;

computes an aberration compensated image based on at least one input parameter related to the at least one optical aberration in the vision system of the viewer and on at least one characteristic of the light field element; and

renders the aberration compensated image on the display medium, such that when a viewer whose vision system has the at least one optical aberration views the aberration compensated image displayed on the display medium through the light field element, the aberration compensated image appears to the viewer with the at least one aberration reduced or eliminated.

2. The display device of claim 1, wherein the at least one aberration is a lower order aberration.

3. The display device of claim 2, wherein the lower order aberration or aberrations are selected from the group consisting of piston, tip (prism), tilt (prism), defocus and astigmatism.

4. The display device of claim 1, wherein the at least one aberration is a higher order aberration.

5. The display device of claim 4, wherein the higher order aberration or aberrations are selected from the group consisting of trefoil, coma, quadrafoil, secondary astigmatism, and spherical aberration.

6. The display device of claim 1, wherein the at least one aberration includes at least one lower order aberration and at least one higher order aberration.

7. The display device of claim 1, wherein the at least one parameter includes a value selected from the group consisting of a spherical correction value, a cylindrical correction value, and an axis value.

8. The display device of claim 1, wherein the light field element includes a parallax barrier mask.

9. The display device of claim 8, wherein the parallax barrier mask is a pinhole array.

10. The display device of claim 1, wherein the light field element includes an element selected from the group consisting of a microlens array, a lenslet array, a lenticular array, a lenticular lens and a lenticular screen.

11. The display device of claim 1, wherein the at least one characteristic of the light field element includes an offset distance between the light field element and the display medium and/or a distance between features of the light field element.

12. The display device of claim 11, wherein said features include a distance between lenslets, or a distance between pinholes.

14. The display device of claim 1, wherein the display medium comprises one of a a clock face, a watch screen, a wrist-worn screen, a cell phone screen, a mobile phone screen, a smartphone screen, a tablet display screen, a laptop display screen, a computer monitor, a computer display screen, a touch-screen display, an e-reader, a display screen on a camera, and a display screen on a video camera.

15. The display device of claim 1, wherein the display medium comprises one of a touch-screen display, a projection display, a heads-up display, a near-eye display, a television display or a home theater display.

16. The display device of claim 1, wherein the display medium is an instrument or gauge or display in an airborne, waterborne or landborne vehicle.

17. The display device of claim 1, wherein an intensity value of a pixel of the aberration compensated image is a function of intensity values of multiple pixels of the image data.

18. The display device of claim 1, wherein the image data includes picture and/or text data.

20. The method of claim 1, wherein the at least one aberration includes a lower order aberration and/or a higher order aberration.

19. A method, implemented in a system including a display, of compensating for at least one optical aberration in a vision system of a viewer viewing the display, the display including a display medium comprising an array of pixels, and the display including a light field element, the method comprising:

receiving image data for an image to be displayed, the image data including pixel values;

receiving at least one parameter related to at least one optical aberration in the vision system of a viewer;

computing, in a processing element of the system, an aberration compensated image to be displayed based on the at least one received parameter related to the vision system of a viewer and on at least one characteristic of the light field element; and

displaying or rendering the aberration compensated image on the display medium, such that when a viewer whose vision system has the at least one optical aberration views the aberration compensated image displayed on the display medium through the light field element, the aberration compensated image appears to the viewer with the at least one aberration reduced or eliminated.

13. The display device of claim 19, wherein that the processor element computes an aberration compensated image includes the processor element applying an inverse blurring algorithm to the image data.