Memory-enhanced image sensor
View Patent ↗An image sensor IC may have a non-volatile memory for several functions. The functions may include storing control parameters for a camera autofocus module, part tracking data, and data for defect correction or color science. The non-volatile memory can in particular be an antifuse non-volatile memory, which may not need special light shielding.
1. An image sensor integrated circuit (IC) comprising:
a substrate;
an image sensing pixel array on said substrate;
an antifuse non-volatile memory on said substrate storing at least data associated with part-tracking;
a volatile memory on said substrate; and
a processor on said substrate configured to write contents of said antifuse non-volatile memory into a region of said volatile memory, and to re-write the contents of said antifuse non-volatile memory back into another region of said volatile memory.
2. The image sensor IC of claim 1 , wherein the data for part-tracking comprises at least one of a sensor ID, a date of manufacture, and a sales region ID.
3. The image sensor IC of claim 1 , wherein the data for part-tracking comprises at least one of a tester ID, and test results.
4. The image sensor IC of claim 1 , wherein the data for part-tracking comprises at least one of a wafer ID, and a die ID.
5. The image sensor IC of claim 1 , wherein said image sensing pixel array comprises a CMOS image sensing pixel array.
6. An image sensor integrated circuit (IC) comprising: a substrate;
an image sensing pixel array on said substrate;
an antifuse non-volatile memory on said substrate storing at least data associated with defect correction;
a volatile memory on said substrate; and a processor on said substrate configured to write contents of said antifuse non-volatile memory into a region of said volatile memory, and to re-write the contents of said antifuse non-volatile memory back into another region of said volatile memory.
7. The image sensor IC of claim 6 , wherein the data associated with defect correction comprises locations of defective pixels.
8. The image sensor IC of claim 6 , wherein the data associated with defect correction comprises couplet locations.
9. The image sensor IC of claim 6 , wherein said image sensing pixel array comprises a CMOS image sensing pixel array.
10. An image sensor integrated circuit (IC) comprising: a substrate;
an image sensing pixel array on said substrate;
an antifuse non-volatile memory on said substrate storing data associated with color filter array reconstruction;
a volatile memory on said substrate; and a processor on said substrate configured to write contents of said antifuse non-volatile memory into a region of said volatile memory, and to re-write the contents of said antifuse non-volatile memory back into another region of said volatile memory.
11. The image sensor IC of claim 10 , wherein the data associated with color filter array reconstruction comprises at least one anti-vignetting data, color channel gain data, and range scaling parameters.
12. The image sensor IC of claim 10 , wherein the data associated with color filter array reconstruction comprises at least one of demosaicing algorithms, range clipping parameters, and gamma correction data.
13. The image sensor IC of claim 10 , wherein said image sensing pixel array comprises a CMOS image sensing pixel array.
14. An image sensor integrated circuit (IC) comprising: a substrate;
an image sensing pixel array on said substrate;
an antifuse non-volatile memory on said substrate storing data associated with embedded firmware;
a volatile memory on said substrate; and a processor on said substrate configured to write contents of said antifuse non-volatile memory into a region of said volatile memory, and to re-write the contents of said antifuse non-volatile memory back into another region of said volatile memory.
15. The image sensor IC of claim 14 , wherein the embedded firmware comprises embedded firmware for a microprocessor.
16. The image sensor IC of claim 14 , wherein the embedded firmware comprises embedded firmware for DSP control.
17. The image sensor IC of claim 14 , wherein said image sensing pixel array comprises a CMOS image sensing pixel array.