Image capture and processing integrated circuit for a camera
View Patent ↗An image capture and processing (ICP) integrated circuit (IC) is provided for a camera. The ICP IC includes an imaging array which, in turn, includes image pixel capture sensors arranged in rows and columns. A row decoder extends along a first edge of the imaging array and is configured to enable sensor rows in the imaging array. An analog signal processor (ASP) system extends along a second edge of the imaging array and is configured to amplify signals from enabled sensors in columns of the imaging array. A control circuit is configured to sequentially enable the rows so that the ASP can amplify signals from all of the sensors in the imaging array, one row at a time.
1. An image capture and processing integrated circuit for a camera, the integrated circuit comprising:
an imaging array that includes image pixel capture sensors arranged in rows and columns;
a row decoder extending along a first edge of the imaging array and configured to enable the sensor rows in the imaging array;
an analog signal processor system extending along a second edge of the imaging array and configured to amplify signals from each sensor in an enabled row, the analog signal processor system having an analog signal processor for each column of the imaging array, wherein a plurality of analog signal processors are configured to provide a dark current reference, wherein the analog signal processor system is configured to sample and hold the amplified signals and to suppress fixed pattern noise in the amplified signals;
an analog-to-digital conversion system extending along the second edge of the imaging array and provided adjacently downstream relative to the analog signal processor system, the analog-to-digital conversion system having a plurality of analog-to-digital converters each receiving inputs from the plurality of analog signal processors and each analog-to-digital converter including a digital-to-analog converter;
a column select logic extending along the second edge of the imaging array and provided adjacently downstream from the analog-to-digital conversion system, the column select logic for selecting outputs from the analog-to-digital conversion system; and
a control circuit for sequentially enabling each row of the imaging array, and thereby communicate signals from the sensors of the imaging array to the analog signal processor system one row at a time.
2. The integrated circuit according to claim 1 , wherein the control circuit includes at least one shift register.
3. The integrated circuit according to claim 1 , wherein the first and second edges extend orthogonally with respect to each other.
4. The integrated circuit according to claim 1 , wherein the integrated circuit is configured to operate using a 1.5V supply voltage.
5. The integrated circuit according to claim 1 , wherein the image array has a pixel resolution of at least 1,500 columns×1,000 rows and occupies a sensory area of no more than 24 mm 2 .
6. The integrated circuit according to claim 1 , wherein each sensor in the image array occupies an area of no more than 4 μm×4 μm.
7. The integrated circuit according to claim 1 , comprising random access memory extending parallel to the second edge of the imaging array.
8. The integrated circuit according to claim 1 , comprising an adjusting system configured to adjust a reference voltage of the analog-to-digital conversion system, configured to receive a pixel signal from the enabled sensors and configured to generate the reference voltage in accordance therewith.
9. The integrated circuit according to claim 1 , wherein each digital-to-analog converter is configured to trim an offset and scale of a respective analog-to-digital converter, and wherein a fixed pattern noise variation between columns is reduced.
10. The integrated circuit according to claim 1 , wherein each analog-to digital converter includes a plurality of digital-to-analog converters, wherein the digital-to-analog converters of the respective analog-to-digital converter are configured to trim an offset or a scale of the respective analog-to-digital converter.
11. The integrated circuit according to claim 1 , wherein each analog-to-digital converter includes a plurality of digital-to-analog converters, wherein the digital-to-analog converters of the respective analog-to-digital converter are configured to reduce the fixed pattern noise between columns.
12. The integrated circuit according to claim 1 , comprising a detector that is configured to receive the signal from the imaging array and to provide a peak value that is used to generate a reference voltage for the analog-to-digital converters.
13. The integrated circuit according to claim 1 , comprising a processor that runs camera functions of the camera and printing functions of a printer that is integrated with the camera, wherein the printer includes a page-width printhead.
14. The integrated circuit according to claim 1 , comprising a processor that runs camera functions of the camera and printing functions of a printer that is integrated with the camera, wherein running the printing functions of the integrated printer includes controlling a solenoid device that causes a printhead to be capped.