Method and apparatus for controlling pixel sensor elements
View Patent ↗An imaging method and system that flexibly accesses light sensor elements and processes imaging signals. The imaging system comprises an array of pixel sensor cells, an array controller and a readout control circuit.
1. A flexible pixel sensor element control system to process a plurality of pixel sensor elements, the system comprising:
an array of pixel sensor elements; and
a readout and processing circuit wherein the readout and processing circuit reads out and averages a first analog value readout from a pixel sensor element of a first color with a second analog value readout from a pixel sensor element of a second color to produce an average readout value;
a first analog line storage unit, the first analog line storage unit been adapted to store a first line readout from the array; and
a second analog line storage unit, the second analog line storage unit being adapted to store a third line readout from the array, wherein the readout and processing circuit averages a second consecutive line readout from the array with the first line readout stored in the first analog line storage unit to produce a first red-green-blue (RGB) triplet, and wherein the readout and processing circuit averages a fourth consecutive line readout from the array with the third line readout stored in the second analog line storage unit to produce a second RGB triplett.
2. The system of claim 1 , wherein the readout and processing circuit is adapted to read a plurality of pixel sensor elements in parallel.
3. The system of claim 1 , wherein the pixel sensor elements form a portion of a charge coupled device.
4. The system of claim 1 , wherein the pixel sensor elements form a portion of a complementary metal oxide semiconductor device.
5. The system of claim 1 , wherein the pixel sensor elements are organized in a rectangular matrix.
6. The system of claim 1 , wherein said line readouts are performed using a full resolution readout mode.
7. The system of claim 1 , said line readouts are performed using a sub-sampling readout mode.
8. The system of claim 1 , said line readouts are performed using a window readout mode.
9. The system of claim 1 , further comprising a color filter overlaying at least a portion of the pixel sensor elements.
10. The system of claim 9 , wherein the color filter includes the colors of red, blue and green in a predefined pattern.
11. The system of claim 9 , wherein the color filter includes the colors of yellow, cyan and magenta in a predefined pattern.
12. The system of claim 9 , where in the color filter comprises a Bayer color pattern.
13. The system of claim 1 , further comprising a micro-lenses layer.
14. The system of claim 1 , further comprising amplifiers adapted to amplify the analog values readout and processed by the readout and processing circuit.
15. The system of claim 14 , wherein the amplifiers are implemented as a separate stage.
16. The system of claim 14 , wherein the amplifiers are contained within a pixel circuitry of the array.
17. The system of claim 14 , wherein the amplifiers are within a plurality of column buffers.
18. The system of claim 1 , wherein a first gain amplifier amplifies a first analog color component a first amount and a second amplifier amplifies a second analog color component a second amount, the first and second analog color components being readout by the readout and processing circuit.
19. The system of claim 18 , wherein the amplifiers are programmable gain amplifiers adapted to be adjusted by a controller.
20. The system of claim 18 , wherein the first gain amplifier provides a first transfer function for the first color component and the second gain amplifier provides a second transfer function for the second color component.
21. The system of claim 14 , wherein at least one of the amplifiers is a summing amplifier that sums the analog values of two or more pixel sensor elements.
22. The system of claim 1 , further comprising a television coupled to said readout and processing circuit.
23. The system of claim 1 , further comprising a personal computer coupled to said readout and processing circuit.
24. The system of claim 1 , further comprising a display coupled to said readout and processing circuit.
25. The system of claim 1 , further comprising a camera coupled to said readout and processing circuit.
26. A flexible pixel sensor element control system that processes of a plurality of pixel sensor elements, the system comprising:
an array of pixel sensor elements; and
a control circuit, wherein the control circuit reads out and averages a first analog value readout from a pixel sensor element of a first color with a second analog value readout from a pixel sensor element of a second color to produce an average readout value wherein the control circuit is adapted to read a plurality of pixel sensor elements in parallel;
a first analog line storage unit, the first analog line storage unit been adapted to store a first line readout from the array; and
a second analog line storage unit, the second analog line storage unit being adapted to store a third line readout from the array, wherein the readout and processing circuit averages a second consecutive line readout from the array with the first line readout stored in the first analog line storage unit to produce a first red-green-blue (RGB) triplet, the readout circuit and processing averaging a fourth consecutive line readout from the array with the third line readout stored in the second analog line storage unit to produce a second RGB triplett.
27. The system of claim 26 , wherein the control circuit reads out and averages the analog values on-the-fly.
28. The system of claim 26 , further comprising gain amplifiers amplifying the average readout value.