IP Library › Granted Patent US 12,192,654
Granted Patent B2
US 12,192,654 · App. 18/644,152 · Granted Jan 7, 2025

Image sensors and sensing methods to obtain time-of-flight and phase detection information

Inventors: Nadav Geva (Tel Aviv, IL); Michael Scherer (Tel Aviv, IL); Ephraim Goldenberg (Tel Aviv, IL); Gal Shabtay (Tel Aviv, IL)
Assignee: Corephotonics Ltd.
H04N25/705G06T7/593H04N13/207H04N13/271H04N25/75
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Quick Facts
Patent No.
US 12,192,654
App. No.
18/644,152
Granted
Jan 7, 2025
Kind
B2
Abstract

Indirect time-of-flight (i-ToF) image sensor pixels, i-ToF image sensors including such pixels, stereo cameras including such image sensors, and sensing methods to obtain i-ToF detection and phase detection information using such image sensors and stereo cameras. An i-ToF image sensor pixel may comprise a plurality of sub-pixels, each sub-pixel including a photodiode, a single microlens covering the plurality of sub-pixels and a read-out circuit for extracting i-ToF phase signals of each sub-pixel individually.

Claims (30)

1. An image sensor pixel, comprising:

a plurality of sub-pixels;

a microlens covering the plurality of sub-pixels; and

a read-out circuit configured for reading out the plurality of sub-pixels and for providing time-of-flight (ToF) information, wherein the image sensor pixel is operational in a first state and in a second state, wherein in the first state the plurality of sub-pixels form together one pixel and the circuit reads out the one pixel, and wherein in the second state the circuit reads out each sub-pixel individually.

2. The image sensor pixel of claim 1 , wherein in the first state, the read out of the one pixel is used for generating a ToF depth map.

3. The image sensor pixel of claim 1 , wherein in the second state, the individual read out of the plurality of sub-pixels is used for generating a stereo depth map.

4. The image sensor pixel of claim 1 , wherein the plurality of sub-pixels includes 2 sub-pixels.

5. The image sensor pixel of claim 1 , wherein the plurality of sub-pixels includes 4 sub-pixels.

6. The image sensor pixel of claim 1 , wherein the image sensor pixel is a direct ToF (d-ToF) image sensor pixel.

7. The image sensor pixel of claim 1 , wherein the image sensor pixel is an indirect ToF (i-ToF) image sensor pixel.

8. The image sensor pixel of claim 1 , included in an image sensor of a camera having a focal length f in the range of 1.5 mm-10 mm.

9. The image sensor pixel of claim 1 , included in an image sensor of a stereo camera having a baseline B in the range of 0.5 mm-25 mm.

10. The image sensor pixel of claim 1 , included in an image sensor of a stereo camera having a baseline B in the range of 0.5 mm-10 mm.

11. The image sensor pixel of claim 1 , wherein each sub-pixel has a size of 1 μm-10 μm.

12. The image sensor pixel of claim 1 , included in an image sensor of a stereo camera that has a vertical or a horizontal baseline.

13. The image sensor pixel of claim 1 , wherein the image sensor pixel is included in an image sensor of a depth camera, and wherein the depth camera is included in a mobile device.

14. The image sensor pixel of claim 13 , wherein the mobile device is a smartphone.

15. A method, comprising:

providing an image sensor pixel that includes a plurality of sub-pixels, wherein the plurality of sub-pixels is covered by a microlens; and

configuring a read-out circuit for reading out the plurality of sub-pixels and for providing time-of-flight (ToF) information,

wherein the image sensor pixel is operational in a first state and in a second state,

wherein in the first state the plurality of sub-pixels form together one pixel and the configuring of the circuit includes configuring the circuit to read out the one pixel, and

wherein in the second state the configuring of the circuit includes configuring the circuit to read out each sub-pixel individually.

16. The method of claim 15 , further comprising, in the first state, using the read out of the one pixel for generating a ToF depth map, and, in the second state, using the individual read out of the plurality of sub-pixels for generating a stereo depth map.

17. The method of claim 16 , further comprising analyzing the stereo depth map and the ToF depth map for assigning stereo scores to segments of the stereo depth map and for assigning ToF scores to the segments of the ToF depth map.

18. The method of claim 17 , further comprising generating a fused depth map by using stereo depth map data for segments that have high stereo scores and using ToF depth map data for segments that have high ToF scores.

19. The method of claim 15 , wherein the image sensor pixel is a direct ToF (d-ToF) image sensor pixel.

20. The method of claim 15 , wherein the image sensor pixel is an indirect ToF (i-ToF) image sensor pixel.

21. The method of claim 15 , wherein the image sensor pixel is included in a image sensor of a stereo camera, and wherein the stereo camera is included in a mobile device.

22. The method of claim 21 , wherein the mobile device is a smartphone.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 24, 2024
From: GEVA, NADAV; SCHERER, MICHAEL; GOLDENBERG, EPHRAIM; SHABTAY, GAL
To: COREPHOTONICS LTD.
Reel/Frame 067201/0947 →
Continuity (6)
Continuation 18450436 · Aug 16, 2023
Continuation 18186151 · Mar 18, 2023
Continuation 17375299 · Jul 14, 2021
Provisional Application 63055912 · Jul 24, 2020
Provisional Application 63052001 · Jul 15, 2020
Related Publication 20240276115A1 · Aug 15, 2024
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