CMOS imager with light shield
First Claim
Patent Images
1. An imager sensor, comprising:
- an array of light sensing elements corresponding to a plurality of image pixels;
a read out circuit configured adjacent the array of sensing elements, at least a portion of the read out circuit including light sensitive circuitry; and
a light blocking layer configured over at least the light sensitive portion of the read out circuit but not over the array of sensing elements.
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Abstract
Improved imaging system includes a CMOS imaging chip with a light blocking layer configured so as to block incident light from a portion of the readout circuitry sensitive to light. The light blocking layer may be positioned on top of a glass package housing the imaging chip or may be incorporated in the manufacture of the chip itself. Distortions in image data due to lighting conditions in outdoor applications are avoided by the presence of the light blocking layer resulting in improved image quality under such conditions.
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Citations
20 Claims
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1. An imager sensor, comprising:
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an array of light sensing elements corresponding to a plurality of image pixels;
a read out circuit configured adjacent the array of sensing elements, at least a portion of the read out circuit including light sensitive circuitry; and
a light blocking layer configured over at least the light sensitive portion of the read out circuit but not over the array of sensing elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An imaging system comprising:
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an optical system for focusing incident light;
an image sensor configured to receive the focused incident light, including;
an array of light sensing elements corresponding to a plurality of image pixels;
a read out circuit configured adjacent the array of sensing elements, at least a portion of the read out circuit including light sensitive circuitry; and
a light blocking layer configured over at least the light sensitive portion of the read out circuit; and
an image processor for processing the image data provided from said image sensor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for preventing image distortion in the image output of a CMOS image sensor having light sensitive read out circuitry, comprising:
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providing a CMOS image sensor in an integrated circuit, said image sensor including an array of light sensing elements and a CMOS read out circuit including light sensitive circuitry; and
providing a light blocking layer over said light sensitive circuitry but not over said array of light sensing elements. - View Dependent Claims (20)
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Specification